Stainless Steel Sliding Barn Door Hardware Kit, Black, (Whole Set Includes 1x Adjustable Floor Guide) 13FT and the rotation axis below

and the rotation axis below is also 18mm/(45/64")

4FT single barn door hardware kit fits a 1 3/16" - 2" thick and 24" wide door

very easy to assemble and install

【Reference Dimension】Ceiling mount barn door box rail fit Max door opening width up to 44" and fit door panel width up to 48"

Stainless Steel Sliding Barn Door Hardware Kit, Black, (Whole Set Includes 1x Adjustable Floor Guide) 13FT and the rotation axis belowProduct Advantage: Roller: High quality stainless steel (Gcr15 roller wheel bearing). Track: Aeronautical grade aluminum, Rigid plate structure, Chrome plating silver surface, Anti corrosion and lighter, Loading capacity becomes more powerful. Easy to Install: Adjustable wall fixed position, you can move the wall hangers wherever you want. The CCJH track is never derailed, anti jump disk is designed on roller, make track in solid and safe status, and