How to control Technical parameters of suction hose?

In some cases, our customers have high requirements on the inner diameter and outer diameter of the hose. As a professional manufacturer of pvc hose and rubber hose, the error between the inner diameter and the outer diameter of the hose needs to be controlled more accurately.
With many years of production experience,  accumulated a set of work that can strictly control the inner diameter of the pipe. Specific case reference to the following figure.

The suction parameters, inner diameter, outer diameter, thickness, rib thickness, spiral pitch, color, and softness can all be customized according to customer requirements.