About this 3D model

1、建议使用内径3mm外径4mm硅胶软管2、从动管轮建议使用“cjx-1-8.0 x4.STL”，如果不够可使用外径8.2mm的滚轮。3、有任何问题可以私聊或者留言。 1, it is recommended to use 4 mm diameter 3 mm diameter silicone hose Round 2, driven tube is recommended to use "cjx-1-8.0 x4.STL", if not can use 8.2 mm outside diameter roller.3, if you have any question can private chat or leave a message.