Welcome to the new way of opening up sliding chain link gates with these pack of 4 nylon cantilever rollers The wheel diameter of these rollers is 4", while the shaft is 1" These cantilever rollers are designed to fit 2 1/2" (2 3/8" OD) round posts and will fit a 1 5/8" round gate frame Each roller is made from high-quality black nylon that makes opening and closing your sliding gate a breeze while the shaft and u-bolts are fashioned from durable steel to ensure long lasting use Always keep safety at top of mind, each of these cantilever rollers include a roller cover that helps to prevent injury during motion Welcome to the new way, safe way to open your sliding chain link gate with this pack of 4 Mini Nylon Cantilever Rollers. Made from high-quality black nylon, these rollers will make opening and closing your chain link gate easy. Measurement of the rollers listed below. Please measure carefully to ensure a great fit. The wheel diameter of these rollers are 4", shaft size 1", will fit 2 1/2" (2 3/8" OD) round fence post, and 1 5/8" round gate frame. Safety is always a priority, so each of these cantilever rollers includes a cover to protect and prevent injury.