This is a pair of mixture control valve O-rings for the O.S. 6H, 7L, 7H, and 8H carburetors. FEATURES: -Silicone construction. INCLUDES: -Two O-rings. SPECIFICATIONS: -Outside diameter: 6mm -Inside diameter: 3mm COMMENTS: -If customer needs the complete mixture control valve O-ring set, he must also buy OSMG7372. ***KPM 4/8/94***