21 - 23 mm Hose Clamp with a Stainless Steel 430 18 mm band - Norma [2 Pieces] | Tameson.com
Oatey 1-1/2-in to 1-1/2-in dia Galvanized 2-hole Pipe Strap in the Pipe Support & Clamps department at Lowes.com
16Pcs 1-3/8 Inch Stainless Steel Conduit Clamps, Two Hole Strap U Bracket Rigid Pipe Strap Metal U Clamp Conduit Strap Tension Clips U-tube Clamp Heavy Duty - Walmart.com