SKU: 833113237

4 Stroke Gasoline Engine Model Metal Internal Combustion Engine Physics Experiment Teaching Instrument

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Description

4 Stroke Gasoline Engine Model Metal Internal Combustion Engine Physics Experiment Teaching Instrument4 Stroke Gasoline Engine Model Metal Internal Combustion Engine Physics Experiment Teaching Instrument Features: . 100% brand new with high quality . The design is novel and the shape is unique . The model is made with fine quality and reliable quality, which can visually observe the operation process of the gasoline engine . Usage: Turn on the power and slowly turn the handle in the direction indicated by the arrow . Suction stroke: The intake valve

4 Stroke Gasoline Engine Model Metal Internal Combustion Engine Physics Experiment Teaching Instrument

Features:

.100% brand new with high quality
.The design is novel and the shape is unique
.The model is made with fine quality and reliable quality, which can visually observe the operation process of the gasoline engine

.Usage: Turn on the power and slowly turn the handle in the direction indicated by the arrow


.Suction stroke: The intake valve is opened, the exhaust valve is closed, and the piston moves downward from the top dead center to the bottom dead center.A mixture of fuel and air enters the cylinder from the intake manifold


.Compression stroke: The intake valve and the exhaust valve are closed, the piston moves from bottom to top,and the fuel mixture is compressed in the cylinder, and the temperature rises rapidly


.Power stroke: When the piston reaches the top dead center, the spark plug is ignited (represented by the bulb at the spark plug)


.The fuel mixture is spotted (the bulb is extinguished to indicate that the ignition is complete). The gas in the cylinder expands rapidly due to being ignited, pushing the piston to start moving downward to the bottom dead center. At this time, the crankshaft outputs power

.Exhaust stroke: Due to the inertia of the rotating mechanism, the crankshaft passes the bottom dead center and the piston moves upward


.At the same time, the exhaust valve is opened and the exhaust gas is discharged from the exhaust pipe.After the exhaust stroke is completed, the exhaust valve is closed, the intake valve is opened, the piston moves downward, a new suction stroke is started, and the next cycle is entered

Specifications:

.Color: As Shown
.Material: Metal
.Product Weight: 1300g
.Package Dimensions: 16*13*29cm    
.Package Weight: 1400g
.Packing: Box 

Package Content:

.1 x Gasoline Engine Model

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SKU: 833113237

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4.6 ★★★★★
Based on 2307 reviews
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Product Reviews
M
Verified Purchase
Melissa J.
Phoenix, US
★★★★★ 5
Elevates your wrist
Color: Right - Black, Size: Large, Color: Right - Black, Size: Large
This is a great tool. No wrist pain day 1. It elevates your wrist to level with the mouse so there’s no backward strain. Takes a little getting use to but well worth no pain.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
S
Verified Purchase
S.S.
Waukegan, US
★★★★★ 3
It's hard af.
Color: Right - Grey, Size: Small, Color: Right - Grey, Size: Small
Edit: just realized Amazon sent me a left handed one! I got this one and the g2 or whatever with the strap. The g2 is great. This one is hard though. The edges of the rest thingy. And the edges in the middle where it splits are annoying. Idk if it's a difference in the rubber pads or what. Even if this works for wrist pain, it's not worth it for the palm discomfort.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
S
Verified Purchase
S Wang
Lexington, US
★★★★★ 5
Ergonomic and effective, but requires adjustment.
Color: Right - White, Size: Large
Bought this for improving wrist posture during long hours at the desk. What I like • The ergonomic design helps reduce wrist strain, especially during extended typing sessions. • The right-handed orientation is comfortable and natural to use. • High-quality build, feels sturdy and durable. What could be better • It takes some time to adjust to the unique design, especially if you’re used to traditional mice. • The size may not be suitable for people with smaller hands. • It could be a bit pricey compared to other ergonomic mice on the market. Bottom line: A great investment for improving wrist posture and reducing strain, but it might not be for everyone due to the learning curve and price. Perfect for users looking to enhance ergonomics, but consider alternatives if you have smaller hands or need a more budget-friendly option.
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Reviewed in the United States on April 20, 2025
M
Verified Purchase
M
Natrona Heights, US
★★★★★ 1
It’s painful. Not worth it.
Color: Right - Grey, Size: Small, Color: Right - Grey, Size: Small
I hate it. Period. Very strong feelings about it right out of the box. Gave it a few days, and not only do I still hate it but it’s very painful to use. The rubber material is hard and has pressure points that make you come away feeling like you’ve rested your wrist on the edge of a table for too long. I come away more sore using this than not. They only have small and large sizes, I think the small is too small for me? (I’m not sure. I can tell it doesn’t fit well, but I can’t tell if it’s because it’s too small or the shape isn’t right for my wrist). In any event, I am sure the large would be too large and even if they had a medium size I still wouldn’t repurchase this. Maybe if you’ve got some meat on your bones it would be more comfortable but as you can see, I am a very thin person and this is pressing on all the wrong places. I also feel like the center valley part contributes to carpal tunnel pain because the very firm edges of each side rested right in that area, not offering any support to the valley of the wrist, and therefore creating pressure to that nerve center and the ligaments. I don’t know why they chose this material, it’s too firm. Also, I think a better design would be a little tab from the center of it sticking out and then attaching to the bottom of the mouse so that both mouse and the wrist “support” worked as one unit when moving the mouse around. I often found that I didn’t drag the wrist piece with my mouse well and that it caused even more issues. If it were comfortable I would have made a little tab myself and connected the mouse and the wrist rest together, but as it’s extremely not even remotely comfortable I’m not bothering and I’ve already started the return process.
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Reviewed in the United States on November 13, 2024
J
Verified Purchase
Jessica
Pawtucket, US
★★★★★ 5
Quality Product, Definitely Recommend
Size: 17.2"L x 3.15"W x 0.78"H, Color: Black Walnut, Size: 17.2"L x 3.15"W x 0.78"H, Color: Black Walnut
Looks and feels great. Amazingly smooth, and well-crafted. It fits the length of my keyboard, and has quality grippers on the base to prevent sliding. Was actually really pleased with it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 15, 2025

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