Greenhouse Accessory Snap Clamp 3/4 Inch X 4 Inches Wide For 3/4 Inch Pipe White 10 per Bag Plus Two 3/4 Inch Grip Clamps by David's Garden Seeds ABS clamps have higher temperature resistance and gripping strength--grip clamps made out of aluminum Compatible with any type of pipe, including PVC Works with regular PVC pipe and other fittings Holds materials covers, plastic, row cover on tubular frame Satisfaction is guaranteed