Features:*Made of positive material, and life like to use*【Easy to Install】No groove required for door. No holes drilled within the floor. It doesn't take much time to install.*【Application】This handbook wheel is dedicated to computerized doors, sliding doors, framed doors, wood doors, metallic doors. Meet all your needs.*【Excellent Design】The silver outdoors design meets most decorative styles, both beautiful and practical. It fits beautifully with every kind of doors.Specifications:Material:SteelSmall size of 7.5*3.5CMLarge size of 10*4CMPackage Contents:1*Door Floor GuideNote:1. The real color of the thing could also be barely various from the photographs proven on web page caused by many factors such as brightness of your display screen and light brightness.2. Please allow slight guide size deviation for the data.