and high qualitySize: 6mm(the size is outter diameter, ring thickness is around 0.2mm)Catch tons of fish on one senko bait, stop wasting your money losing bait every fishGreat for use as seals for fitting or as fly fishing tie accessories.Perfect for hinge rigs and tying D rigged hooksWhether being used to mount baits on a D-, slide on a hook , use on hinge rigs or as a small and strong link between different lines, these strong rings are ultra reliable and an absolute 'must have' in any well stocked tackle box. Invaluable.Seamless for good knot strength.Anti Glare finish for stealthy presentation.Anti Rust and super strong - they will never let you down at a critical moment.Colour: blackMaterial: rubberPackage Contents:100pcs * O-ringOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.