High quality material: Designed for Apple Watch 38/40/41mm 42/44/45/49mm Series 1 (2015), Series 2 (2016), Series 3 (2017),Series 4 (2018). Series 5 (2019),Series 6 (2020),Series 7( 2 0 21 ), Series 8(2022), Series 9(2023) These are polished by a number of processes and colored by vacuum plating.
eBay