Includes (1) CAC-437-2 Check ValveNew, Bulk PackedGenuine OEM replacement partConsult owners manual for proper part number identification and proper installationPlease refer to list for compatibilityCompatible with : DeVilbiss : IRL5G20 Type 0, IRL5G20 Type 2, IRL5G20 Type 3, RAL5G20 Type 0, RAL5G20 Type 2, RAL5G20 Type 3, IR5G20AD Type 0, ACBL660V Type 0, ACBL660V Type 1, L6560V Type 0 6.5HP 60G, IRL6560V Type 0 6.5HP 60G, HL6560V Type 0 6.5HP 60G, EXL6560V Type 0 6.5HP 60G, RAL6560V Type 0 6.5HP 60G, 5E20AD Oil, 5E20AD-1 5 HP Oil Lube Portable, 5E30AD (Type 0) 5HP Oil Lube Portable, 5E60VAD 5 HP Single Stage Stationary, 5E60VAD-1 5 HP Single Stage Stationary, 6E60VAD 6 HP Single Stage Stationary, 35E20AD-1 3.5 HP Oil Lube Portable, L2512 (Type 0) 2.5 HP Oil Lube Portable, L2520 (Type 0) 2.5 HP Oil Lube Portable, L530VP (Type 0)