Feature: 1. Can cover the gaps between the watch band and movement for watch waterproof. 2. Professional watch repair tools, great accessory for watch repair and DIY watchmaker. 3. The o-ring with 2 t more→hicknesses and 10 sizes to meet your different needs. 4. Made of high quality rubber material and has a long service life, durable and practical. 5. Excellent replacements for different sizes from 16mm-34mm. Specification: Condition: 100percent Brand New Item Type: Watch O-Ring Gasket Material: Rubber Dia: 0.5mm, 0.6mm 0.5mm, 16mm --- 34mm (16, 18, 20, 22, 24, 26, 28, 30, 32, 34 each), 10 sizes, about 20pcs per packet, a total of 200pcs. 0.6mm, 16mm --- 34mm (16, 18, 20, 22, 24, 26, 28, 30, 32,…