Most options are made from tungsten (tungsten carbide); listings and product descriptions repeatedly identify tungsten carbide as the ring material and core.
Most listings show an 8 mm band width. Sizes are typically offered in standard US sizes 7–15, with half sizes commonly available roughly from 7.5–12.5.
These bands are described as comfort-fit, featuring a slightly rounded or curved interior for smooth, all-day wear. Some listings specifically call out domed or curved interior profiles.
Descriptions emphasize tungsten carbide’s exceptional hardness and scratch resistance, noting it’s very durable and designed for daily wear. Some listings describe it as nearly scratch-proof.
Product copy states the tungsten carbide used is nickel-free and non-corrosive, describing the bands as hypoallergenic and suitable for sensitive skin. If you have severe metal sensitivities, verify the specific listing details before purchasing.