- 1x 7x14x3.5mm (CS547) ball bearing - 1x M3x30 bolt - 4x M3x20 bolt - 4x M3x16 bolt - 4x M3 nylock nut - 5x M3 nut - 1x M4x50 hex head bolt - 3x M4 washer - 1x spring with k=6-7N/mm with ID slightly larger than 4mm. Bertho's spring calculations: http://www.vinland.com/Spring-Testing.html