We use tube to connect the frame wires of the bed core.
How do we choose tube size?
We need to know an important parameter: the diameter of the frame steel wire, because this determines the inner diameter of the tube. Generally, the inner diameter of the tube is the diameter of the steel wire + 0.5mm. For example,the diameter of the frame steel wire is 3.8mm, the inner diameter of the tube should be 4.3mm.