These support ring clamps are made of a one-piece plated-steel construction, and are intended to hold flasks or other labware on a support stand. This
GSC Go Science Crazy Cast Iron Support Ring Stand:Clamps and
Ring Support, Closed, 4 Inner Diameter - Cast Iron - Eisco Labs
SCC — ROMAC INDUSTRIES
Global Truss 1-1/3in Wrap Around Jr Cheeseboro Swivel Clamp
Accessory - SkyRC
Tilt Classic SCS
3/4 Universal Strut Clamp Assembled Electro-Galvanized 100/Box
CC2 Membrane Clamping Collar
Cosmic Truss Clamps - Cosmic Truss Couplers – Accessories
Product Listing - Rcracingpro
Weaver Grand Slam Top Mount Riflescope Rings 49321 B&H Photo
Wilton - C-Clamp: 4″ Max Opening, 4″ Throat Depth, Regular-Duty
Cv Boot Clamp
Gibraltar Super Universal Grabber Clamp