Description: Multipurpose electrical connector kit with box. Easy to operate, no soldering kit needed. Widely used in rings, hooks, quick disconnects, and butt connectors. Precision fit, high-tolerance dies are used in the molding process, flared opening for easy wire insertion. Made of quality material, durable and practical to use, provide a safe and durable connection for your electrical wiring. Specification: Material: Brass Box Size: 13x6.6x2.2cm / 5.12x2.6x0.87inch Size Chart: M3 x 50pcs Inside Diameter: 3.5mm/0.13" Outside Diameter: 6mm/0.23" Length: 15mm/0.6" M4 x 20pcs Inside Diameter: 4mm/0.15" Outside Diameter: 7mm/0.27" Length: 15.5mm/0.6" M5 x 20pcs Inside Diameter: 5mm/0.2" Outside Diameter: 9mm/0.35" Length: 17mm/0.66" M6 x 20pcs Inside Diameter: 5.5mm/0.21" Outside Diameter:12mm/0.47" Length: 22m/0.86" M8 x 20pcs Inside Diameter: 8mm/0.3" Outside Diameter: 14.5mm/0.57" Length: 25mm/1" M10 x 20pcs Inside Diameter: 9mm/0.35" Outside Diameter: 17mm/0.66" Length: 29mm/1.1" Package Includes: 150 Pieces Ring Crimp Terminals Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.