These parts are sold as 4 Complete Rollers. When you order 1 item, you'll get 4 Rollers. There are many other types and sizes of Rollers. (The 3rd Picture shows what the old style original roller looks like).
Canopy Bed Netting Mosquito Net with Curtains - Elegant 4-Corner Bed Frame Post Canopy with Curtain Brackets for Complete Protection
Breathable Bed Plate Solid Wood Futon Frame Folding(en:Solid Wood Folding Bed Frame, Rollable Slatted Futon Mattress for Bedroom & Living Room, Compact & Durable, 78.7" x 35.4" Ideal for
Breathable Bed Plate Solid Wood Futon Frame Folding(en:Foldable Wooden Bed Frame with Roll Slats, Twin/Double Size Mattress Support (74.8"x35.4"), Durable 90x200cm Slats for Easy Setup an
Breathable Bed Plate Solid Wood Futon Frame Folding(en:Foldable Bed Frame with Wooden Slats Support, Twin/Double Size (39.4"x74.8"), Durable Roll Slats for Easy Storage & Setup, Perfect f
Breathable Bed Plate Solid Wood Futon Frame Folding(en:Portable Tatami Bed Frame, Foldable Wooden Slatted Mattress Base, Space-Saving Roll-Up Design for Bedroom & Living Room (78.7"x39.4"
Breathable Bed Plate Solid Wood Futon Frame Folding Breathable Moisture-Proof Bed Plate Japanese Floor Futon Mattress Breathable Bed Plate Japanese Bed Frame Solid Wood Futon Frame Waist Pro
