Features: Made of high-quality silicone material, soft and comfortable, safe and nontoxic, has a long service life. Durable rubber watch band loop. The watch band loops are made up of very durable silicone, resin material which fits very well with the band and hold it well, comes in black color, which suits all the different color type band. The replacement fastener sleeves will match well with your watch. Easy to use. Just slide the ring over the clasp. Best replacement safe rings for the watch band. Perfect fit for your for smart watch activity tracker and provide comfortable wearing experience. Watch band fastener ring only, other accessories demo in the picture is not included Specifications: Material:Silicone Size: As Picture Shown Color:Black for Vivoactive3 For Vivomove/Vivomove for HR/Vivoactive 3/venu for Fenix 7S/for Fenix 6S/for Fenix 6S Pro/for Fenix 5S/for Fenix 5S Plus/instinct 2S Forerunner 645/645 Music/245/245 music For watch 42MM SM-R810 /SM-R815 Active/Active 2 /Gear S2 Classic For Smart Watch A1 608/GTS For Watch fit/ Watch 2 Pro /B5 band/ GT2 42MM/for Honor for ES band For LS02 watch Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 10x Watch Band Fastener Ring