B&B Pipe 1221 PDQ Pipe Clamp (Medium) fits 2" to 6" Pipe for Pipe Fitting, Fit Up, and Welding (One Pack) - Amazon.com
Pipe Clamp, 5 to 12 in, High Strength Ultra Clamp with Quick Acting Screws, Steel Pipe Alignment Tool with Lightweight Design, for Pipe Fitting, Fit Up&Welding - Amazon.com
VEVOR Pipe Clamp Fixture 5 in. to 12 in. Capacity Clutch Clamp Set High Strength Steel with Quick Acting Screws for Alignment HJDGQYCBD5-12U9P2V0 - The Home Depot
Pipe Alignment Clamps for external alignment of pipe & tubes & fittings.
Tube clamps - Malleable Iron Pipe Clamp Fitting 143-A27.
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
SOKO Ultra Pipe Clamp Tools, 2 To 6 in Ultra Steel Pipe Fitting Tool with Lightweight Design, High Strength Ultra Screw Clamp with Quick Acting Screws, Strong Hand Pipe Alignment Clamp Tools -
Pipe Fittings - Ductile Iron 3/8 in. Beam Clamps Class 300 UL/FM