NVENT CADDY, Stand Off, 1/2 in Pipe Size (In.), Split Ring Hanger - 1RVD4|4550050EG - Grainger
Oatey 1/2-in to Galvanized Split Ring Hanger in the Pipe Support & Clamps department at Lowes.com
Highcraft Hinged Split Ring Pipe Hanger, 1-1/2 in. Galvanized Iron Extension Hanger with 3/8 in. Threaded Rod Fitting for Suspending Tubing (5 Pack) - Walmart.com