Review on Enhanced Stainless Steel Hose Clamps by Winlong by Jason Hayes

These are good clamps. Maximum diameter is 1-3/4" decreasing to 3/4" depending on denomination. I use them on 250 psi polyethylene (HDPE) irrigation tubing for 1" and 1-1/2" tubing. Note that 1" pipe is IPS (which measures the INSIDE diameter, resulting in a pipe about 1-1/4" in diameter). 1-1/2" diameter polymer tubing is measured with CTS (Copper Tubing Stnd) which is measured from the OUTSIDE of the tubing (which means the inside diameter is much smaller. Make sure you get this, what you asked for!) these clamps are too small.