This is the OS Engines 10LA non-ring .10 glow engine, with 10H carburetor and included OS 871 Muffler.

Features:

• More cooling fin area extends the life of the engine, and virtually eliminates engine seizures in the air
• Added "webbing" on the crankcase strengthens high-stress areas to help ensure that they stand up to the rigors of learning to fly
• Overall tighter needle valve fit utilizes an "O" ring to help maintain the performance levels you need
• A fuel inlet that points up allows for easier fuel line access for fueling and defueling

Specifications:

• Engine: 10LA    
• Displacement (cu in): .107 (1.76cc)    
• Bore (in): 0.529 (13.4mm)    
• Stroke (in): 0.488 (12.4mm)    
• RPM: 2,500-18,000    
• Output (HP@rpm): 0.27 @ 17,000    
• Weight (oz): 3.95 (112g)    
• Recommended Props: 7x4, 7x5