Circo 12-EZ Light Grip ABS Snap Clamp 3/4 Inch X 4 Inches Wide, 10 per Bag ABS clamps have higher temperature resistance and gripping strength Compatible with any type of pipe, including PVC; Holds material on tubular frame Excellent for building greenhouses, row covers, shelters, quilting frames and more Inside Diameter (ID) of clamp is 0.90 inch; The allowed range is 1.046 - 1.054 in Inches Fits around 3/4 inch PVC pipe with an outside diameter (OD) of 1.050 inches.