Package Contents: 100 UR Connectors. Suitable for most types of wire connections, electromechanical devices, household appliances, distribution lines, lighting lines, etc. UR type button type connector is a single-pole moisture-proof type for direct 3-wire connection. The applicable wire diameter is 0.4-0.9mm²/AWG 19-26 and the maximum outer diameter of the insulation is 1.67mm. It solves the problem of complicated wiring work for screw crimp terminals. Belongs to the butt splice of UR type wire connector which has changed the twisting and soldering connection method of complicated conventional cable wire. Ideal for sub-wiring, wire connection between small and medium-sized power lines, fast and convenient. The internal gel-filled design ensures the conductor's airtight environment. Applicable to low-voltage alarm or telephone installations, connect telephone lines, data signal cables, and other conductors.  Can be easily installed.  Simply push or twist to insert the wire ends directly into the terminal block holes. Safer and more efficient: insulation, safety, easy to use, just complete the suite using a vise, with dedicated wiring pliers, etc., with good effect, fast, 100% connection rate, telephone, network wiring project, it is a small effect K3 sub-type monomer wiring moisture, using polar connection for direct wire connection.