20mm
- Glass

Available Sizes:
2.4mm (10g), 4mm (6g), 5mm (4g), 6mm (2g), 8mm (0g), 11mm (7/16"), 13mm (1/2"), 14mm (9/16"), 25mm (1")

Available Sizes:
2.4mm (10g), 3.2mm (8g), 4mm (6g), 6mm (2g), 8mm (0g), 10mm (00g), 12mm (15/32"), 20mm, 22mm (7/8"), 24mm, 25mm (1")

Available Sizes:
12mm (1/2"), 14mm (9/16"), 20mm, 22mm (7/8"), 24mm

Available Sizes:
10mm (00g), 12mm (15/32"), 16mm (5/8"), 22mm (7/8")

Available Sizes:
5mm (4g), 10mm (00g), 16mm (5/8"), 20mm

Available Sizes:
5mm (4g), 6mm (2g), 8mm (0g), 14mm (9/16")