DPJ end type is it adopt high-quality zinc alloy die casting , gold is it succeed to process to connect, surface adopt zinc-plated plating hard chromium punish generally, special place surface deal with on request, aesthetic in appearance products,, structure close having air venting , intensity high, connect with hose , steel tube , good that there is sealing nature, advantage of take precautions against earthquakes , antiseptic , waterproof , dustproofing etc.. The size of specification , can press the equipment , case body , wanton change of steel tube , requirements of the hose , whorl . One end joins the hose (the steel tube ), the whorl connects switch case , electrical machinery , bridge shelf ,etc. outside one end. Whether order please indicate hose specification and whorl size, example. 15 DPJ - G1/2 ", one end Φ 15 hose , another end G1/2 " other whorl".