Rubber Pop-Up Valve Seat
4 Inch ID x 5.5 Inch OD. Fits blast pots with a 4 inch opening in the blast machine head.
Model 1642, 1648, 2443 & 2452 Item # 21
Model 2016 Item # 11
WetBlast Flex Item #11
Clemco Part #02325
See the bottom of the product manuals for diagrams of additional compatible products.