Hinged Split Ring Pipe Hanger 3/4" IPS- Galvanized Split Loop Ring Style Pipe Support Suitable for fire protection, fire suppression, plumbing, and the hanging of steel pipe and iron pipe. For suspension of non-insulated stationary pipe lines. Zinc Plated Malleable Iron TRUE INSIDE DIAMETER IS 1-1/8" NOT 3/4". 3/4" Iron Pipe Size for 3/8" Threaded Rod Galvanized Split Ring Pipe Hangers