ITEM NAME:200pcs Waterproof O-Ring Watch Back Seal Gaskets Watch Repair Tool (0.7mm) A#S Product Description Description: Specification: 0.5mm : 16mm-34mm/0.62-1.33in (16, 18, 20, 22, 24, 26, 28, 30, 32, 34 each small pack), 10 sizes, each packet is about 20, 200pcs in total. 0.6mm : 16mm-34mm/0.62-1.33in (16, 18, 20, 22, 24, 26, 28, 30, 32, 34 each small pack), 10 sizes, each packet is about 20, 200pcs in total. 0.7mm: 16mm-34mm/0.62-1.33in (16, 18, 20, 22, 24, 26, 28, 30, 32, 34 each small pack), 10 sizes, each packet is about 20, 200pcs in total. Tips: Hand-packed, the number may vary slightly. Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3cm measuring deviation due to manual measurement. Included: 1 Pack X Waterproof O-Ring( 200pcs).Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. If item is defective after 3 months, you can still send it back to us.