Black Carbon Steel Wall Mount Adjustable Sliding Barn Door Bottom Floor Guide With Ball Bearings And Flush Flat Bottom Design-JHC825 Robust Carbon Steel Construction The main floor guide structure is fabricated from premium carbon steel, ensuring exceptional strength and resistance to deformation. The steel components undergo advanced surface treatment powder coating, to enhance corrosion resistance. Precision Ball Bearing Design Integrated high-performance ball bearings within the wheel assemblies enable effortless, low-friction door movement. The bearings are carefully selected and installed to ensure long-lasting, reliable operation over countless cycles. Versatile Design and Installation