316 Satin Stainless Steel Tubing 1.67" OD Tube 0.08" (42.4 x 2mm) - 49-A114 - Architectural Railings - Tubing
Amazon.com : Carbon Fiber Tripod INNOREL ST424C Professional Heavy Duty Camera Stand with 75mm Bowl Adapter 42.4mm Tube, Max Load 92.6lbs/42kg,Max Height 66.9in/170cm for DSLR Camcorder Travel Shooting Bowl Tripod : Electronics
Pipe Clamp System 42mm Fittings & Connectors (42.4mm) Tube Galvanised Allen Key | eBay