Fangrui Product Details When Installing, Please Push The Inner Ball To The Top Of The Slide Rail First, Then Connect With The Slide Rail, And Finally Push It Lightly To Complete The Installation. The Slide Rail Has Excellent Anti-rust And Mute Function, And There Are Two Rows Of Solid Steel Balls Inside, Load-bearing And Mute The Of The Slide Rail Is Treated With Electrophoretic Blackening. Improves And Oxidation Resistance. Made Of High-quality Cold-rolled Steel, The Soft-close Drawer Slides Can Hold Up To 100 Lbs, 40 Lbs More Than Regular Slides. There Is A Black Plastic Buckle On The Back, Which Can Be Easily Disassembled By Pressing The Inner Rail, And Easy To Install. Fully Telescopic Rails For More Convenient Storage. Size: 30 X 5 X 4cm Material: Cold Rolled Steel Colour: Black Package Contents: 1 Pair X Drawer Slides 8 X Screws Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real T