All Features: Steel with powder coat, Max. door weight: 44 lbs. (20 kg), Suitable for door thickness of 1” – 1-3/16” (25 – 30 mm), Additional rollers only available, Black wheel is made of POM (polyformaldehyde), Applications: Kitchen islands, Bathroom vanities, Dressers, Decorative window covering, Hidden TV solution Color: Black Matte Brand: US Futaba Package Contents: 2 Door Stoppers 1 Rail, Length 5’ 10” 2 Anti Jump Blocks 2 Sliding Door Rollers 1 Floor Guide Screws and Allen Key Sell Without Stock: No