Premium Quality 23B-15-16130 Seal Kit for KOMATSU GD605A-5 GD611A-1 GD621R-1 GD623A-1 GD625A-1 GD661A-1 GD663A-2. OEM Equivalent Hydraulic Seal Repair Kit, Delivers Excellent Sealing Performance, Extended Service Life & Reduced Downtime. by topsealkit