[19mm to 20mm]
For example d1xd2 (mm): 8x8, 8x16, 8x20, 10x14, 11x17, 12x14, 14x14, 14x17, 17x18, 17x20, 19x20, 20x20. Material: 6061 aluminium alloy Package Content: 1pc Coupler