Sliding door rollers are designed for single or double sliding doors. 17mm wheels provide better contact with the barn door and glide easily and quietly. The wheels contain ball bearings to keep the door quiet and smooth. The floor guide of the barn door is made of stable and durable metal, robust and antioxidant, offers a longer service life, and can withstand rust, corrosion and deformation. Easy to install, no groove required for the door, easy to attach to the roller guide on the lower guide in the right place and fix the screws. Suitable for most sizes of door panels. Product include a total of 2pcs floor guides, great compatibility and high reliability, which can completely meet your daily use needs and replacement. Base Materi.