Circular: 16 - 88.9 mm Square: 19x19 - 70x70 mm Rectangular: 25x15 - 100x40 mm Flat oval: 25x15 - 78x38 mm Oval: 22x16.5 - 31x17.5 mm Wall Thickness: 0.9 - 3.0 mmCircular: 0.63 - 3.50 in Square: in Rectangular: in Flat oval: in Oval: in Wall Thickness: 0.04 - 0.12 in |