R0552000 tank adapter with union and O-ring 4-piece compatible with for Zodiac DEV series D. models DEV48, DEV 60 and series filter models 100, 150, 200, 250.Also compatible with for Zodiac DEL, CV, , CJ and series filter. R0552000 tank adapter with union and O-ring 4-piece is made of high-quality plastic and brass, waterproof, , -, good elasticity, good sealing, not easy to break. Easy installation: Easy installation could help you to save more time. , place smaller, thicker o-ring onto threads of tank adapter.Secondly, place larger, thinner o-ring onto gauge housing. Precautions: If it is first replacement, you need to pay attention,never start pump while standing within five feet of filter or operate filter system at more than 50 psi of pressure. Please note:the physical slightly color difference or difference, does not affect use, please do not mind, thank you! Colour:Black Material:Plastic+Brass Package Contents: 1 * R0552000 Tank Adapter with O-Ring and Union Replacement kit Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.