The 45# steel universal joint connects two shafts and can be bent at any angle. It can be used in various model cars and model boats. It is small, exquisite and durable. 4 - 5mm, which means connecting shafts with diameters of 4mm and 5mm. Product material: 45 gauge steel Specifications: 2-2mm, 2-2.3mm, 2.3-2.3mm, 2.3-3mm, 2.3-4mm, 3-3mm, 3-3.17mm, 3-4mm, 3-5mm, 3.17-3.17mm, 3.17-4mm, 4-4mm, 4-5mm, 5-5mm, 5-8mm, 6-4mm, 6-5mm, 6-6mm, 6-8mm, 8-8mm, 8-10mm, 10-10mm, 3-2mm.
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