Features:* brand new and *Made of material, and realistic to use*【Easy to Install】No groove required for door. No holes drilled in the floor. It doesn't take a lot time to install.*【Size】The rubber pulley could be adjusted 30mm to 60mm.It suits most door types.**【Application】This guide wheel is dedicated to automated doors, sliding doors, framed doors, wooden doors, metallic doors. Meet all of your needs.*【Excellent Design】The silver exterior design meets maximum decorative styles, both exquisite and practical. It suits fantastically with every kind of doors.Specifications:Material:SteelSmall size of 7.5*3.5CMPackage Contents:1*Door Floor GuideNote:1. The genuine colour of the thing could also be barely diverse from the pictures proven on web page caused by many points such as brightness of your visual display unit and light-weight brightness.2. Please allow slight manual dimension deviation for the data.