H is a pr. ARDWARE ONLY, DOOR IS NOT INCLUDE. Tainlesssteel barn door hardware kit. Heavy duty roller bearing. High strength industrial grade track. Water Resistant and Rust Proof for long lasting use. Tep by Step instruction very easy to understand. Perfect for an exposed sliding door in the bedroom, study room, living room or kitchen. Hangers made of stainless steel. Rails made of space aluminum nickel plating. Max Door weight capacity: 220 lbs. 1.35″ to 1.6″ (35mm- 40mm). Min distance between the door and ceiling 4.7/12cm. The diameter of the rail is 25mm/1. Ngle Door Track Kit. 2 PC (1 PAIR). 4 PC (2 PAIR). How to Choose the Correct Track Size? Door Min Track Size= 2 × Single Door panel Width. Example: For a 36″/3FT door, recommend you choose a 72″/6FT track at least. Door Min Track Size= 4 × Single Door panel Width. Example: For a 36″/3FT door, recommend you choose a 144″/12FT track at least. Tip: If you have enough space you can also choose the longer track size.