Gobrico Ball Bearing Kitchen Soft Closting 18-inch Full-Ext Drawer Slides 100-Pound Capacity,10 Pairs (20 pieces) Length:18"(450mm),Thickness:1/2"(12.7mm), Width:45mm,Load capacity:100LB Short Deliverying Time:Shipped from USA Material:Cold Rolled Steel;Package Content:10Pairs Drawer Slides,Installing Screws,Installation Instruction.Easy to install Hydraulic Soft/Self Close feature to slowly draw the drawer closed without slamming shut To determine which size of slides are good for your drawer, please measure the length of the drawerwithout the frame board.And if the length is not even, please choose1 inch shorter.The length of slides can't be longer than the cabinet case depth