... is as follows: Type Z: it consists of inner layer, fiber heat insulation, cover layer, anti-wear rubber strip. It has advantages of ... condition. Type G: the hose is made of inner layer, fiber heat resistance, cover layer, metal spire, and anti-wear strip. It is ... than 0.1kPa/m of the hose. 2. Material property Inner layer it is made by coating nylon with PVC or CR ...