WSI-OR-40-130 Oring for WSR4/C4 Filter Head
Filter Oring for WSR4 & WSC4
Oring for Jumbo Filters - 5.3mm x 139mm
Fits both WSI models WSR4 and WSC4 Stainless Steel Filter Heads.
These O'rings DO NOT extrude when the sump is tightened, as the Stainless Steel Sump is pushed up through the ORing and tightening is achieved via a collar which simply holds the sump up.