.4mm Diameter, 1" long chain. 3 Small round pad (3.4mm diameter) with very slight concave shape. Eyelet profile so it's easy to pick up. Great in "holes". • Versatile styles of stainless steel pads with chains for ligation of unerupted teeth • Nickel free 14K gold chain: non allergenic, completely reliable, and very well made in the USA • The chain is smooth and comfortable, not at all bulky, yet the loops readily accommodate all popular sizes of elastic threads • Sold 5 per package.