• Set of 200 rubber O-rings for watch repair and maintenance. • Variety of diameters included from 16 mm to 30 mm. • Available in thicknesses of 0,5 mm and 0,6 mm to adapt to different cases. • Manufactured in high-quality material with excellent flexibility and wear resistance. • Provide a hermetic seal that protects against dust and water ingress. • Includes a storage box for easy organization and selection of pieces. • Indispensable accessory for watchmaking professionals and repair shops.