Feature: 1. Can be used for highstrength fasteners, mechanical fasteners, furniture fasteners. 2. M4, M5, M6, M8, M10, M12, multiple models, multiple sizes to meet different needs. 3. Made of high quality nylon plastic , high strength, not easy to break. 4. There are 145pcs hex nut dome cap, suitable for long term use. 5. Well packed and assorted in a resealable transparent box for convenient storage and carry. Specification: Item Type: Hex Nut Dome Cover Material: Nylon Plastic Color: Black Quantity: 145pcs. Package List: 15 X M1220 x M1010 x M820 x M630 x M550 x M4Can be used for highstrength fasteners, mechanical fasteners, furniture fasteners. M4, M5, M6, M8, M10, M12, multiple models, multiple sizes to meet different needs. Made of high quality nylon plastic , high strength, not easy to break. There are 145pcs hex nut dome cap, suitable for long term use. Well packed and assorted in a resealable transparent box for convenient storage and carry.