Snap clamps are used to attach tarps, shade cloth, netting or other material to the pipe. Some applications include greenhouses, row covers, shelters, bird protection, dog beds, and padded frames. There are two types of clamps available, both made of ABS: an HD snap clamp for long-term use and an EZ clamp for light duty, or frequent on-off use. ABS clamps have a higher temperature resistance compared to a snap-on PVC clamp, allowing it to maintain its gripping power for a long time. Snap-on clamps are heat sensitive and may lose gripping strength if exposed to temperatures above 140 degrees F. Clamp size is based on the inside diameter of the PVC pipe it is attached to. hooks up. When used on conduit, polyethylene tubing, or other tubing measured by outside dimensions, use a smaller 1/4-inch snap clamp (i.e. 1-inch polyethylene tubing will take a 3/4-inch snap clamp ).