Comply with DIN3017 Germany standard with Non-Perforated band(Worm Gear Clamp), the perfect smooth of band's brim, no burr on surface to damage the hose when installation. The design of convex-concave band is having more stable quality in heat or cold temperature.
W2(AISI430S.S.) Band& Housing are made of AISI430 Stainless steel,but Screw us Galvanized with Cr3+ coating,the most economic choice (the most popular type)
W4(AISI304S.S.)AISI304S.S.Band,Housing and Screw
W5 (AISI316S.S):AISI316S.S Band, Housing and Screw (The high ratio of Nickel element)
W2(AISI430S.S.)Hardware,Home DIY,Garden,Low applying of the corrosion resistance
W4(ASIS304S.S.)Heavy Industry,Food Industry,Machine,medium applying of corrosion resistance
W5 (AISI316S.S):Marine, high applying of the corrosion resistance