Features:*Made of wonderful material, and lifelike to use*【Easy to Install】No groove required for door. No holes drilled in the floor. It doesn't take much time to install.*【Application】This handbook wheel is devoted to automatic doors, sliding doors, framed doors, wood doors, steel doors. Meet all of your needs.*【Excellent Design】The silver outside design meets most decorative styles, either beautiful and practical. It fits beautifully with all kinds of doors.Specifications:Material:SteelSmall size of 7.5*3.5CMLarge length of 10*4CMPackage Contents:1*Door Floor GuideNote:1. The genuine coloration of the item could also be barely various from the images proven on web content caused by many factors similar to brightness of your computer screen and light-weight brightness.2. Please enable slight handbook dimension deviation for the data.