AR-668 Waterproof O Ring Watch Back Gasket Washers Replacement Watch Accessories

Feature: 1. Install waterproof O?ring to the watch or replace the waterproof ring, ensure the waterproof function of watch. 2. Contains 90 different sizes of the waterproof ring, suitable for different watch types and watch model to use. 3. Included storage box makes your articles not easy to lose and more convenient to storage, convenient to use. 4. One of the professional watch repairing tools, suitable for repairmen and amateurs to save expensive repair costs. 5. Small and convenient, easy to carry and convenient transportation, exquisite workmanship, no scratching for watch. Specification: .Item Type: Waterproof O Ring Material: Plastic Applicable People: Watch maintenance professionals Application Scenario: Used to add waterproof ring to the watch or replace the waterproof ringWidth: Approx. 0.9mm / 0.04in Double Ends Diameter: Approx. 17.34 x 18.5mm / 0.68 x 0.73in 17.84 x 19mm / 0.7 x 0.75in 18.84 x 20mm / 0.74 x 0.79in 19.34 x 20.5mm / 0.76 x 0.81in 20.34 x 21.5mm / 0.8 x 0.85in 20.84 x 22mm / 0.82 x 0.87in 21.84 x 23mm / 0.86 x 0.91in 22.34 x 23.5mm / 0.88 x 0.93in 23.34 x 24.5mm / 0.92 x 0.96in 26.34 x 27.5mm / 1.04 x 1.08in 34 x 28.5mm / 1.34 x 1.12in 30.34 x 31.5mm / 1.19 x 1.24in 27.8 x 29mm / 1.09 x 1.14in 30.84 x 32mm / 1.21 x 1.26in 28.34 x 29.5mm / 1.12 x 1.16in 31.34 x 32.5mm / 1.23 x 1.28in 28.84 x 30mm / 1.14 x 1.18in 31.84 x 33mm / 1.25 x 1.3in 18.34 x 19.5mm / 0.72 x 0.77in 29.34 x 30.5mm / 1.16 x 1.2in 19.84 x 21mm / 0.78 x 0.83in 24.84 x 26mm / 0.98 x 1.02in 21.34 x 22.5mm / 0.84 x 0.89in 25.34 x 26.5mm / 1 x 1.04in 22.84 x 24mm / 0.9 x 0.94in 25.84 x 27mm / 1.02 x 1.06in Package List: 1 x Storage Box 90 x Waterproof O Ring