Set of O ring for MSU. ( 1 ) As per ABB/ Drawing No: IBO 12- 00754 or latest, size: Dia. 480mm, Thickness: 8mm, Qty = 02 nos./ set. ( 2 ) As per ABB Drawing No: IBO 12- 00755 or latest, size: Dia. 382mm, Thickness 8mm. Qty = 01 nos./ set. Material NBR 70- Din 37 ( ISO 3601 ). One set consisting of 02 items 03 nos./ set.