This electrical connector assortment has a total of 308 pieces. It's tin plated copper constructed terminals & connectors provides a secure connection between two wires without soldering. The UL listed 100 percent polyolefin constructed heat-shrink tubing provides an insulated and flame retardant covering for wrapping wire harnesses. The nylon cable clamps are perfect for neatly securing and organizing cables, wires, tubing and rods. It includes a neatly organized in a divided PVC storage case with chart inside box lid for easy selection.