ZJchao Large Waterproof Watch Head Ring - Rubber Watch Crown O-Ring Seal for Watch Repair - Durable Replacement Part for Diving, Swimming & Outdoor Sports Watches

Feature:1. Professional watch O‑ring watch gaskets are used to keep watches waterproof, prevent water getting into watch.2. High quality rubber material, flexible and wear‑resistant and durable, high elasticity and reliable in use, will not damage your watch3. Including a total of 10 different sizes to fit different crowns, suitable for watch makers and watch repairing workers to use.4. Easy to install, take out the lever, put it into the waterproof ring and install the lever, easy and convenient for installation.5. Professional watch repair accessories, give you a satisfactory experience and has exquisite workmanship.How to Use:Take out the lever, put it into the waterproof ring and install the lever.Specification:Item Type: Watch Crown O-RingMaterial: Rubber Color: Black Applicable Crowd: Suitable for watch maintenance professionalsApplication Scenario: Used to keep the watch level waterproof, prevent water getting into watchSize: Approx. 3.2 x 1.7 x 0.75mm / 0.13 x 0.07 x 0.03in3.2 x 1.8 x 0.7mm / 0.13 x 0.07 x 0.03in3.4 x 1.8 x 0.8mm / 0.13 x 0.07 x 0.03in3.6 x 1.7 x 0.8mm / 0.14 x 0.07 x 0.03in3.65 x 2.15 x 0.75mm / 0.14 x 0.08 x 0.03in4.6 x 3.2 x 0.7mm / 0.18 x 0.13 x 0.03in4.25 x 2.25 x 1mm / 0.17 x 0.09 x 0.04in4.2 x 2.8 x 0.7mm / 0.17 x 0.11 x 0.03in4 x 1.8 x 1.1mm / 0.16 x 0.07 x 0.04in3.8 x 2.2 x 0.8mm / 0.15 x 0.09 x 0.03in Package List:1 x Storage Box 1 x Box of Watch Crown O‑Ring