Lasco 1-1/2"x1-3/4"x1/8" #81 Faucet O-Ring. Crafted from durable nitrile (Buna-N) rubber, this versatile O-ring is designed for faucet repair and various other applications. It ensures a precise fit and an improved seal to prevent leaks. Compatible with numerous faucets, this O-ring is suitable for both DIY and professional plumbers. Bagged.