Features: Make of brass and treated with coppers tins plated, it have good conductivity. Good quality joints are impacts resistant and will not bend and loosen over time. The Insulating Sleeve make of Insulation materials, Flame retardant feature ensures safety. Just prepare a crimper, then you can crimp the connectors and connect wire in a few time without soldering. You can identify the cable ranges of this crimp connectors by the color. AWG22-16 (redness), AWG16-14 (blue). Specifications: Materials: Brass tins plated Size: As shown in the picture Wiring square: 0.5-6mm² Package Includes: 50Pcs MDD2-250 Blue 16-14AWG 50Pcs FDD2-250 Blue 16-14AWG 50Pcs MDD1.25-250 Redness 22-16AWG 50Pcs FDD1.25-250 Redness 22-16AWG 50Pcs Bv2 Blue 16-14AWG 50Pcs BV1.25 Redness 22-16AWG note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.