Fit Most Door:Support up to 330lbs door, 6ft single rail bypass kit fits 1.18″-1.57″ thick door and Max 33″ wide door; Roller diameter: 2.68″. Premium Hardware:Main Material: High Quality Carbon Steel; Surface: Frosted Black, Water Proof, Rust Proof, Robust and Resistant. Easy to Install:Step-by-step simple install manual with both pictures and professional data. Please notice that the clearance needed from the top of your door to the ceiling is 6.3 at least. Door stoppers with spring, no noice, slide smoothly and quietly; 3. Precisely designed rail connector, to ensure seamless transition from rail to rail; 4. Antique rustic decor to boost modern charm. Service After-sales:Any problem during using it, our professional Customer Service Team will help you to solve it.