Check the listing for details. Farm Plastic Supply - ABS Greenhouse Clamps. Condition: New. Listed at 15.99 USD. 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.Please note: Our Products are packaged to minimize Shipping Cost and Shipping Delivery Times. Our Carriers deliver on time at a rate of 99%. Call with any Special Requests.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.Please note: Our Products are packaged to minimize Shipping Cost and Shipping Delivery Times. Our Carriers deliver on time at a rate of 99%. Call with any Special Requests.