Check the listing for details. 4Pcs 1.57" x 2.36" Slide Gate Guide Rollers, Nylon Bearing Guide Roller, White. Condition: New. Listed at 34.69 USD. Description:Material - The slide gate guide rollers are made of nylon, with a stable structure, strong bearing, durable, good wear resistance, impact resistance, not easy to deform, and can be used for a long time.Feature - The nylon sliding door guide roller can prevent the sliding door from tipping over from the track. It can also effectively reduce the noise generated by the sliding friction of the door, making your sliding door run smoother, more stable, and quieter.Easy to Use - The slide gate roller is easy to install and use. It can be installed on the bracket or the rear post wall, and then use a wrench to make appropriate adjustments to make the roller direction up or down, to achieve smooth operation of the sliding door.