Set of O- ring for motor suspension unit ( MSU ), material as per NBR 70- DIN3771 ( ISO3601 ) ( 1 ) O- ring of size- Dia 480 mm. Thickness 8mm as per ABB Drg No. IB012- 00754, Qty- 2 Nos ( 2 ) O Ring of size- Dia 382 mm, Thickness 8mm, as per ABB Drg No. IB012- 00755, Qty- 1 No.