Part Name: 3KR2 Piston Ring Kit Set Cylinder Bore: 81mm Piston Size: TL 80.0mm Pin Diameter: 27.0 x 65.0mm Compatible Part Numbers: 8-94375-196-1, 8943751961, 8-97176-890-0 Application: Fits 3KR2 Engine used in EX30, EX35, EX40 Excavators, Sumitomo S80F2, S80FX3 Excavator This kit includes a complete set of piston rings and components designed for standard 81mm bore applications.The set is engineered for use with the specified engine model and compatible models listed above. Important: This is a non-OEM part.Any brand or model cited is used to denote device compatibility.