Ventilation hose with PVC spring:

Bone ventilation hoses are produced from PVC materials and are another example of ventilation hoses, which have hard PVC bone springs in their walls. These hoses are light weight and flexible and are used in the food industry, construction, agricultural straw collectors and air conditioning systems, and are less flexible than ventilation pipes with a metal spring and have a smooth inner surface.

Working temperature: resistant in the temperature range of -20 to +80 degrees Celsius