Strap Pipe Clamp Material Steel Clamp Material Finish Pre-Galvanized Clamp Type Standoff Two-Hole For Maximum Outside Diameter 1 1/2 in For Pipe Size 1 1/2 in Mounting Hole Diameter 0.25 in Number of Mounting Holes 2 Overall Height 3.5 in Overall Length 4.25 in Overall Width 1 in Standards ASTM A653