Hose made of very heavy spiral reinforcement of rigid PVC on the outer surface of hose. Means outer surface will be corrugated and inner surface plain. Keeping a wall thickness of 2 mm. Made available in Grey / Black colours. A very heavy flexible hose for collection and conveying of air, dust and light materials. Quality PVC compounding and extrusion techniques have made the hose with better flexibility and service life then other commercial brands.