How to make the choice "correctly"

Customers often ask questions when buying a hose protector: How much size should I buy? 

For the customer's problem, we have given a relatively simple method, taking the application of computer cable as an example:

1. Arrange the scattered wires, wrap them with rope or thread and mark the length.

2. Measure the length of the rope mark with a ruler, outer diameter = length / 3.14.

3. If the length is 80mm, the outer diameter is 25.5mm. It is recommended to use the spiral cover of HPS-22 or HPS-20.