CCJH 2PCS Adjustable Barn Door Stopper fit for 1.57inch/40mm Flat Track, Sliding Barn Door Hardware Accessories Replacement[Durable & Sturdy]: This heavy duty barn door stopper can tightly hold on the track easily, barn door rail stopper only fit for 1 9 16"(4cm) wide and 1 4"(6mm) thickness track, and only fit for less than 3 15 16"(10cm) in diameter of roller wheel. Note: T roller and Y roller cannot use this barn door stopper. [Easy Installation]: You can hang barn door stopper across the track easily even though a finished project, we have this spring barn door