These are size #10 continuous, endless plastic bead chain loops that arrive ready to install on your blind or shade. The diameter of one bead is
Size #10 Continuous Plastic Bead Chain Loop for Roller Shades
Continuous Beaded Chain Loop
Plastic Ball Chain #10 Continuous Loop White 6
RollEase Roller Shade Plastic Chain Loop
Roller Shade Bead Chain Archives
Continuous Beaded Chain Loop
4.5mm Blind Plastic Bead Continuous Endless Chain Loop for Clutch Roller Shades
Continuous Plastic Bead Chain Loop
roll - Fix My Blinds
Plastic Bead Chain Loop, size #10. For Roman Shade, Roller Screen, RBC03P6W, FBC04P6W
Metal Bead Chain Loop, size #10. Nickel. For Roman Shade, Roller Screen. BCL23, BCL24, BCL25
Plastic Ball Chain #10 Continuous Loop White 2
Plastic Bead Chain Connector for Size #10 Chain – Fix My Blinds
RollEase Roller Shade Plastic Chain Loop
#10 Nickel Plate Continuous Loop Metal Bead Chain for Clutch Roller Window Shades - 60 Drop Length : Industrial & Scientific