The bezel is only suitable for original Seiko quartz tuna, 1000m SBBN013, SBBN025, SBBN027, SBBN029, SBBN040, SBBN051. Imitation 1000m tuna or other styles cannot be used. If you are unclear, please contact the shop owner. Made of 304 steel, brushed and polished, silver is natural color, black, gold, rose gold PVD plated. The original meter reading size and timing circle size are all interchangeable. There is a rubber ring inside the ring. When assembling, make sure the rubber ring does not come out. The provided fixed rubber ring is 39.5 x 0.8mm and it is slightly tight, close to the original. If you have high requirements, please do not buy. Thank you. The watch and ceramic bezel are for display only and not for sale.