High quality Material: Hanger: stainless steel; track: Aeronautical-Grade aluminum material, chrome-plated surface, professional anti-corrosion operation. [Notice: hardware only, not including port]. Scope of Application: The 16FT double sliding door hardware kit accommodates the maximum door width: 48"; fits door thickness: 1 3/16"- 1 5/8"; maximum weight capacity: 220lbs. [Notice: only suitable for wooden door]. Durable and Strong: There is a support part in the middle of the track, this unique load-bearing structure-keel makes the whole hardware kit more powerful, stronger sense of use. Easy to Install: Step-by-step installation manual to simplify the installation process. Includes 1-set track, 4x hangers, 4x door-stoppers, 2x floor guide, 1x installation instruction. Reliable Serivice: Through rigorous quality-control, meticulously packed to avoid scratches on shipping; The professional customer support team helps you solve any questions in time.