Wire protector, silver-plated brass, 5mm tube, 0.5mm inside diameter. Sold per pkg of 100.

Wire protectors are designed to protect beading wire against wear from clasps and other sharp-edged components. Wire protectors are similar to bullion or French, but in a pre-curved horseshoe shape. Inside hole diameter is 0.5mm. Accommodates wire up to 0.019 inch diameter. Due to the manufacturing process, sizes vary slightly.