Fangrui Product Details [premium Quality]automatic Door Closer Is Made Of Aluminum Alloy , Spring Operation, Totally Automatic Closing; Antioxidative, Anticorrosive, Weatherproof, Steady, Abrasion , Quiet And Safe Closer [keep Your Home Quiet And Safe]automatic Closing And Latching, Maintaining Quiet And Security. Use These Door Closers To Convert Hinged Doors To Self-closing And You Dont Have To Worry About Your Kids Escaping From Home Or Your Pet Dogs/cats Running Into Your Room [double Springs]this Door Closer Is Equipped With Double Springs, Offering Stronger Strength To Accommodate Doors Of Different Thicknesses [easy Installation]with A Door Closer And Slide Plate Being Mounted, Installation Is A Breeze.this Spring Door Closer Can Be Used On Doors Up To 30 Kg, And Easily Adjust The Tension On This Safety Spring Door Closer [proper Size] Suitable For Door Weight For 20-30 Kg, Universal Design, Right Or Left Wing Door, For Home, Office, Hotel Room Doors Please Note; The Physical Slightly Color Difference Or Differe