This is the Carburetor for the O.S. Max .21XM Marine Engine. / / INCLUDES: One Assembled Carburetor / One Rubber O-ring (Gasket) / / FEATURES: Aluminum and Brass Construction / Metal Throttle Lever Arm / Rotary Barrel Type Carb / High Speed and Idle Mixture Control Needle Valves / / SPECS: Overall Height: 34mm (1-11/32") / Overall Width: 61mm (2-13/16") / Carb Throat: Inner Diameter: (Oval In Shape) 10mm Length, 8.5mm Width / Outer Diameter: 15mm (Including Brass Sleeve) / ir/jl