Wedding ring made of concrete WOLFRING. The quality concrete steel ensures long-term use of the ring without scratches. Concrete, despite its hardness comparable to that of diamond, can be resized and expanded easily. Rings made from this material are highly durable, do not tarnish, do not rust, and withstand water, extreme temperatures, chemicals, and many other external factors. Many of our rings are gold-plated. The set includes an elegant branded piece from WOLFRING Jewelry, made from recycled plastic. Model: R01. The provided measurement is EU25, US11 (see the size chart in the last photo). There is no possibility of resizing from this offer. Concrete steel - WOLFRAM RING. Hundreds of times more durable and resilient than surgical steel, 316L, and several times harder than titanium!