Large sized exhaust valve seal and check valve seal for Crosman 100, 101, 102, 104, 105, 106, 107, 108, 190, 110, 111, 112, 113, 114, 115, 116, 118, 120, etc. These are modern seals made from urethane used to make typical airgun seals. The OD of this seal is 0.445 inches.
