This is the O-Ring Set for the OS Max 40E, 86, C14, 60B, 60G, 60H, and 60L carbs. It mounts to the mixture control valve. FEATURES: Silicone construction. INCLUDES: Two O-rings. SPECS: Outside diameter: 6mm Inside diameter: 3mm COMMENTS: Can be used for other applications where a 3x6mm silicone o-ring is called for. NNA 1/20/02