End connector, tube with open end. Slide stuff into the tube, i.e. ends of ball chain, knotted cord, beadweaving, and close the little door on the end of the tube to secure. Excellent for delicas, seedbeads. Comes with extension chain and lobster clasp. 4mm inside diameter. Takes up to size 8 seed beads.

Made in China. 5mm x 13mm (set)