This kit includes: Cyclonic Concentric Injector Adapter Base Assembly, Qty. 1 (N0790143) Injector Adapter Cap, Qty. 1 (N0791163) Injector Adapter Washer, Qty. 1 (N0776014) Viton O-Ring 6.07 mm I.D., Qty. 1 (09902207) Viton O-Ring 7.65 mm I.D., Qty. 1 (09926070) PTFE Coated O-Ring, 8.74 mm I.D., Qty. 1 (N0791333)