Feature:1. It is one of the professional watch repair tools, suitable for watch repairers and amateurs, very practical.2. The design of the storage box makes your items not easy to lose and more convenient to store.3. Light weight and in small size, convenient to store and carry, and convenient to transport at the same time.4. There are many models and sizes to meet your different needs, important accessory for watch repair shop.5. Mainly used to add or replace the O-Ring of the watch, simple operation, bring you convenience.Specification:Condition: 100% Brand NewItem Type: Watch O-RingMaterial: PlasticApplicable People: Watch repair professionalsApplicable Scenarios: Used to add or replace the O-ring of the watchSize Chart:16.8 x 16mm / 0.7 x 0.6in29.3 x 28.5mm / 1.2 x 1.1in17.3 x 16.5mm / 0.7 x 0.6in29.8 x 29mm / 1.2 x 1.1in17.8 x 17mm / 0.7 x 0.7in30.3 x 29.5mm / 1.2 x 1.2in18.3 x 17.5mm / 0.7 x 0.7in30.8 x 30mm / 1.2 x 1.2in18.8 x 18mm / 0.7 x 0.7in31.3 x 30.5mm / 1.2 x 1.2in19.3 x 18.5mm / 0.8 x 0.7in31.8 x 31mm / 1.3 x 1.2in19.8 x 19mm / 0.8 x 0.7in32.3 x 31.5mm / 1.3 x 1.2in20.3 x 19.5mm / 0.8 x 0.8in32.8 x 32mm / 1.3 x 1.3in20.8 x 20mm / 0.8 x 0.8in33.3 x 32.5mm / 1.3 x 1.3in21.3 x 20.5mm / 0.8 x 0.8in33.8 x 33mm / 1.3&nbs