Premium Material: The bullet wire connectors are made of highly conductive brass plated tin, which is anti-oxidation and durable. The insulating sleeves are made of nylon, flame retardant and safe. Easy to Use: And the cable lugs can grip the cable insulation or the cable itself well and provide a secure grip. Simply connect the male and female terminals at both ends, and then the male and female terminals are inserted to easily complete the wiring. Easy to store: All electrical connectors and insulating sleeves are packed in a plastic storage box, easy to carry and find, easy to store and carry. Wide applications: The automotive electrical terminal set is suitable for most appliance switches, automobiles, batteries, audio equipment, household appliances, electronic components with pins, etc. Widely used in household, industrial and other fields Package Content: 30pcs 2.8 male and female connectors, 30pcs 4.8 male and female connectors, 30pcs 6.3 male and female connectors, 15pcs 4.0