supply of kit for cut off angle cock to rdso drg. no. wd-88123-s-01 alt.2, consisting of 3 itemsin 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.matl. and specn. as per drg. with latest specification .