Not included in the package and. El Sliding Barn Door Hardware K. Roller Material:Carbon Steel Track Material: Aluminum Maximum load-bearing capacity of a single door. 330bls (150kg) Suitable for door thickness. From 1 3/16″ to 2″3cm-5cm. Durable & Safe? High quality barn door hardware kit, Premium nylon roller wheel, Gcr15 roller bearing, High strength industrial grade track, Can easily hold 330bls loads. Advantage?? Spring Door Stops, reduce noise and extend life? Pre- drilled rails, steel bearings? Wide Applicability? The rustic wooden sliding door fitting are very easily to decorate and suitable for bedroom, study room, dressing room, kitchen, closet, cabinet, farmland etc. Ply you within 24 hou. Step by step installation manual, professional after-sales customer service help you install easily. E head of the door stopper is nylon arc, Perfect fit with roller pulley radian, reducing noise. About Track : The material of the track is aluminum, which is very light. After special processing, the bearing capacity is extremely strong. No need to slot the door, no need to punch holes on the floor, there is an auxiliary wheel at the back, and wheels are made of nylon, fully protect your door panel. Nti-falling wheel on the roller, can effectively preven. T the roller hanger from falling off during sliding. About Roller : Main material is carbon steel, adjustable screws, suitable door thickness from 3cm-5cm. T shaped floor guide can prevent t. He door from swinging out or up against the baseboard. Eeds to be pre-slotted on the bottom of the door panel. Accoding to rail holes. 1 hole need 1 set. Roller Bolt: x4. Door Stopper: x2. T-shape Floor Guide: x1. Install Manual: x1. How to Choose Track Size. Track’s length should be. Of door panel’s width (like your door width is 2.5FT/76cm, You will need 5FT/152cm Kit for single door).