Zinc-alloy For Track: 41×7mm/1.61"×0.28"(L×W). Material: The barn door roller stopper hardware is made of carbon steel, which is not easy to rust and can be used for a long time. Function: Limit the movement of door. Easy to install: You could install/release these Door Stoppers on track smoothly with ease. Noise-free buffer rubber cover which is harmless to your door. Package content: 2 pcs stopper with wrench; Black Simple Nordic Style. Please notice the size in detail before purchasing.
For your reference,the detail size as attached below picture,and the allowable range of data errors by manual measurement is about 1-2mm.