This set of copper sealing washers in various metric sizes is a must-have for any DIY enthusiast or professional craftsman. Crafted from high-quality copper, these washers are perfect for a wide range of crafting projects, particularly those involving eyelets and sump plug washers. Expertly designed for durability and functionality, these copper sealing washers are ideal for use with a range of materials, making them ideal for multi-purpose crafting projects. Whether you're working on crafting pieces or other crafting supplies, these washers are sure to provide excellent results.