The Plumber's Choice 1/2 in. Hinged Split Ring Pipe Hanger in Uncoated Malleable Iron 12HSHB - The Home Depot
The Plumber's Choice 1-1/4 in. Hinged Split Ring Pipe Hanger, Malleable Iron Clamp with 3/8 in. Rod Fitting, for Suspending Tubing (5-Pack) 114HSHB-5 - The Home Depot
10 Pcs Split Ring Pipe Hanger Pipe Clamp Fit OD 2"(51mm) Pipe,304 Stainless Steel Heavy Duty Adjustable Rigid Handleless Flat Pipe Bracket Clamp for Ceiling Wall Mount Hanger Pipe Support : Amazon.co.uk: