... 2)Material:stainless steel 304/316 3)Surface:Satin or Mirror polished 4)tube: 38.1, 42.4, 48.3, 50 ... .8mm Stainless steel balustrade glass clamps for tubes 1. Shape: D shape glass clamp, Round shape glass clamp, Square glass clamp2. Type: Curved back ... .4mm, 48.3mm, 33.7mm, 50.8mm etc. 5. Surface: Mirror polished and Satin. For more dimensions of different shapes' clamp ...