These generic crystals are made to fit many of the highly popular Seiko® brand watches. This makes them an easy repair when you break your crystal and want to replace the part without having to send the watch in to the service center, saving shipping and insurance costs. These are generic made to fit and not to be confused with genuine Seiko® crystals. With a wide range of generic Seiko® crystals to choose from you should be able to find one to fit your watch. Made of Sapphire glass. These crystals are available in Flat and Round Shape . Sold individually.