The wire ends are made of high-quality copper material with tin-plated surface, which has excellent conductivity and oxidation resistance; the ferrule crimping sheath is made of PVC insulation material, which is comfortable to the touch and durable. Use a crimping tool to easily crimp the ferrule and secure the ferrule to of the cable. For connecting machines to HMI, PLC and power supplies, speakers or other electronic devices. All ferrule connectors are stored in transparent and sturdy storage boxes with compartments. The ferrule connector set is stored individually, well organized, and easy to carry and find. No mess during transportation and easy to use. The specific specifications are as follows: 22AWG, 0.5mm; 20AWG, 0.75mm; 18AWG, 1.0mm; 16AWG, 1.5mm; 14AWG, 2.5mm; Suitable for conductor assembly, wiring and deep processing, and has good uses in electrical systems, machinery, and electricity. Suitable for electrical control distribution, power electronics, relay protection, distribution cabinets, machine tool equipment, etc., helping to achieve safe and professional connections. Colour:As Shown Material:Plastic+Copper Package Contents: 170 * red terminals (50PCS TE0508, 40PCS TE7508, 40PCS TE1008, 25PCS TE1508, 15PCS TE2508) 170 * yellow terminals (50PCS TE0510, 40PCS TE7510, 40PCS TE1010, 25PCS TE1510, 15PCS TE2510) 160 * blue terminals (50PCS TE0512, 40PCS TE7512, 30PCS TE1012, 25PCS TE1512, 15PCS TE2512) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.