Features: Male and female spade connectors are made of high quality tin-plated red copper, whose surfaces are plated with tin which ensures good conductivity and corrosion resistance. The insulating sleeves are made of nylon, high conductivity, anti-oxidation, durable enough for your use,matching crimp terminal ,safe to use. Male and female spade connectors comes with three different sizes:2.8mm/4.8mm/6.3mm are perfect for 22-14 gauge wire, different sizes can meet your different needs. Male female spade connectors are easy to use. Just crimp and/or solder to your wires and cover with a nice high-quality heat-shrink for a clean, solid, and professional connection. Packaging: It includes 240 pcs 2.8mm/4.8mm/6.3mm male and female crimp terminal connector blocks, 120 pcs 2.8mm/4.8mm/6.3mm insulating sleeves and 120 pcs protective sleeves, packed in a plastic box. Specifications: Material: Copper+Plastic Weight: 60g Size: As picture shows Package Includes: 50 pcs 2.8mm male crimp terminal connector blocks 50 pcs 2.8mm female crimp terminal connector blocks 50 pcs 2.8mm Insulating Sleeves 40 pcs 4.8mm male crimp terminal connector blocks 40 pcs 4.8mm female crimp terminal connector blocks 40 pcs 4.8mm Insulating Sleeves 30 pcs 6.3mm male crimp terminal connector blocks 30 pcs 6.3mm female crimp terminal connector blocks 30 pcs 6.3mm Insulating Sleeves 120 pcs protective sleeves note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.