This is the Muffler Mounting Screws for the #761, #761C, and #871 OS mufflers. It can also be used for mounting mufflers to .12-.15 size Kyosho engines. FEATURES: Metal Construction Black in color Phillips head type INCLUDES: Two Muffler Mounting screws. REQUIRES: None, item is a stock part. SPECS: Screw size: 2.6mm x 23mm COMMENTS: These screws are used to mount the muffler to the engine. If the assembly screw is needed for the #871 muffler, use OSMG6903