FISCHER Pipe Clamp FRS Plus is available in a series of sizes that cover pipe diameters from 1/2" to 3½". The range includes models 20‑24 for 1/2", 32‑37 for 1", 48‑54 for 1 ½", and 95‑103 for 3½" with matching M8/M10 fasteners. These clamps can be used wherever these pipe size and fastener specifications are required.