KIT FOR CUT OFF ANGLE COCK to RDSO Drg. No. WD- 88123- S- 01 Alt. 2, consisting of 4 items in a set- ( 1 ) ' O ' Ring Item No. 12- 2 Nos./ KIT. ( 2 ) ' O ' Ring Item No. 4- 1 No./ KIT ( 3 ) Seat Item No. 2- 2 Nos/ KIT. ( 4 ) Spring item No.- 8- 1 No./ kit. Material and Specification as per RDSO Spec. No. 02- ABR- 02 with Amend No. 4 and Appendix- D