The material is malleable iron zinc plated. The size is from SL-22 to SL-1275.  White or yellow colour.

Our air hose coupling ( Universal Coupling, Quick Coupling, Hose end, Female end, Male end, US type, EU type) and double bolt hose clamp stand with high quality, good looking in shape and enjoy a good reputation from our customers abroad.If you are interested in our products, please feel free to let me know.