High quality waterproof wire connectors easy twist-on wire nuts to make secure electrical wire connections.Wire connectors include a cone shaped spring insert for making solid, stable connections to grab the wires firmly.Great for home, speaker, automotive, and residential wiring.Comes in a nice see thru plastic case making it easy to identify and storeCone shaped spring holds the wires firmly together;tight wire spring makes quick and secure connections.Easy to install,make the job quick and easy with no tools necessary.Assorted sizes for various electrical wire gauges, great addition to your electrical connector kit.colour:Photo ColorMaterial:plasticPackage Contents:40 * Grey Min.2x22 Max. 2x16 40 * Blue Min.2x22 Max. 3x16 50 * Orange Min.1x18/1x20 Max.4x16/1x20 18 * Yellow Min.2x18 Max.4x14/1x18 10 * Red Min 2x14 Max.2x10/2x12Only the above package content, other products are not included.Note: Light 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.