White or black push on greenhouse snap clamp to attach Greenhouse Film to Hoops and purlins. These hoop house pipe clamps are made of ABS so they don't have the Chloride that deteriorates the UV protection of 4 year Plastic.  If your hoops are made of PVC, keep the 4 year plastic from touching the PVC with a thin layer of tape and clamp over the outside with these clamps.  Spacing recommendations of 2-4' depending on the windiness of your location.

Black 1 1/4" ABS Clamp - The allowed range is 1.66 - 1.74 in Inches. 

1 1/4" ABS Clamp - The allowed range is 1.66 - 1.74 in Inches.

3/4" ABS Clamp - The allowed range is 1.046 - 1.054 in Inches.

1" ABS Clamp - The allowed range is  1.25 - 1.375 in Inches.