This replacement high volume O-ring is used on the two-stage K-Pumps. This is the large O-ring that is used on the K-Pump 40 and 400.
Specs
Dimensions:
Outside diameter: 4"
WARNING: This product can expose you to Di(2 - ethylhexyl)phthalate(DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. More about California Proposition 65 »