3inch sliding gate u groove nylon rollers,sliding door nylon wheel,u groove diameter 50mm,steel track roller with groove u.
5Pcs 5x25x9mm Pom Delrin U Groove Pulley Guide Wheel Bearing Pulley Furniture Door Moving Wheel
5pcs 5 * 20 * 7 U groove door window nylon bearing Sliding wheels rollers pulleys diameter 20mm thickness 7mm bore 5mm(Black color)
TSWASWUGP TMP1105 544162 Outer Ring with U-Groove Bearing 5x19x6mm Wire Cable Pulley Walking Heavy Crane U Groove Wheel Bearings 10PCS Roller(051906U2 1)
4 * 18 * 7/8U sliding bearings with U-groove,U-groove pulley/roller/roller,bearing diameter 18mm,bearing bore 4mm.