31mm-40mm Watch O Ring Gasket Watch Back Sealing Rubber Spare Parts (0.7mm 0.8mm 0.9mm)

Feature: 1. Made of high quality rubber material and has a long service life, durable and practical. 2. The o-ring with 3 thicknesses and 10 sizes to meet your different needs. 3. Professional watch repair tools, great accessory for watch repair and DIY watchmaker. 4. Can cover the gaps between the watch band and movement for watch waterproof. 5. Excellent replacements for different sizes from 31mm-40mm. Specification: Condition: 100percent Brand New Item Type: Watch O-Ring Gasket Material: Rubber Dia: 0.7mm, 0.8mm, 0.9mm 0.7mm, 31mm-40mm, 10 sizes, about 50pcs per packet, a total of 500pcs. 0.8mm, 31mm-40mm, 10 sizes, about 50pcs per packet, total 500pcs. 0.9mm, 31mm-40mm, 10 sizes, about 50pcs per packet, total 500pcs. . Package List: 30 x Bag of Watch O-Ring Note: Purely hand-packed, the quantity may be a little error(some more, some less), depending on the real objects. Thanks for your understanding.