Standard size pump diaphragms fully molded from black gum rubber for abrasion resistance.

#2 Pump Diaphragm:
Size: 2”
I.D.: 3-7/8”
O.D. 11”
Approx.Height: 1-3/4"

#3 Pump Diaphragm:
Size: 3”
I.D.: 5”
O.D. 13”
Approx.Height: 1-3/8"

#4 Pump Diaphragm:
Size: 4”
I.D.: 5-1/2”
O.D. 15”
Approx.Height: 2-1/4"