Material: Iron Color: Black Size: 115*50*65*6mm Accessories: Screws and Anchors Package Included: 1* Door Swing Stopper [Easy to Install] There is no groove on the door. Just attach two screws to the bottom rail and screw the roller guides in place. Superior DurabilityThe sliding door bottom rail is made of high quality iron, and the high temperature surface is coated with high pressure black powder coating to ensure corrosion. Easy to SlipSmooth bearings are easy to slide, then the door slides easily. The floor rails have a flat bottom that won't damage the door, and the floor slides smoothly and quietly. More DIY OptionsWe provide two sets of 8-1 sliding doors to give customers more installation options. Add a piece of fabric to make it quieter. At the same time, we provide customers with free gloves to make your experience more comfortable