H. P. Piston complete 60 mm dia as per ELGI Part No. 0413121 consisting: ( 1 ) Piston with gudgeon pin to ELGI Part no. 000477730, Qty. 01 No. ( 2 ) Piston Ring Set to ELGI Part No. 022401039, Qty. 1 Set. ( 3 ) Circlip to ELGI Part No. 000917218, Qty. 02 Nos.