Beadaholique Slide Tube Clasp, 3 Rings Strands 21.5mm, 4 Clasps, Gun Metal Plated Color: Gunmetal Materials: Gunmetal Measurements: 21.5mm long, central tube is 4mm thick, end caps are 6mm in diameter. Rings are 3.5mm in diameter and about 4.5mm apart. Quantity: 4 Pieces Shape: Tube