Part # 4040-17A
Manufacturer Code SP1085D
Dimensions 18" X 8-1/4"
Alternate Part #'s 2511935, G157, HAY2511935, HAYSPX1085D, SP-1085-D, SP1085D, SPG-601-1007, SPX1085D, SPX1085DPAK2
Gasket, Skimmer Widemouth (Set of 2) - SPX1085D
The original gaskets are like a rubber material. These 2 gaskets look as if they are made of cork? Are they made of cork or something else?