DPJ end joint is made by casting using high quality zinc alloy, and finely processing. And surface is plated generally by zinc and hard-chrome, for special spot, it can be surface-treated according to requirements. It features elegant outline, compact structure, no pore and high intensity. When it is connected with hose, steel pipe, tightness is good, with quakeproof capability, corrosion-resistance, waterproof capability, dustproof capability. Size can be adjusted randomly according to equipments, casing, steel pipe, mouth diameter of hose, threads. One end is connected with hose (steel pipe), the other end is connected with switch casing, motor, bridge shelf and so on. Please note clearly specifications of hose and threads dimension, for instance: DPJ 15-G1/2 is with one end as Φ15 hose and the other end as G1/2 outer threads.