Astral Multipoint Valve Replacement Valve Diverter O'Ring Set 40mm Or 50mm 
 
Genuine Replacement Diverter O'Ring set (2) for Astral multipoint 40mm and 50mm valves
Genuine replacement part number 75062
 
This listing is for a set of 2 o'rings as 2 o'rings are required to replace the set in the MPV
Suits multiport valves as follows: 40mm & 50mm Multiport Valve Sept 2009 to current