The PARTSMASTERPRO Flat Washers are perfect for fixing your leaky faucet. These flat rubber washers provide a full flow of water. If your 2 or 3-handle faucet won’t shut off completely, you may need to replace your faucet stem’s bibb washer. The washers feature rubber construction. They are designed for use with compression stems (hot, cold or diverter). Not for use on single-handle faucet cartridges or stems with ceramic disc operation. These washers deliver a positive seal to help prevent leaks.