POSI – Lock connector has been tested in the world, since 1997. Hand tighten only for superior as straight seams. These electrical connectors are crimped to the required and not included. Electrical Connectors are today meets the needs of your OEM, Very Well Made, and reusable. Its the last connector in the 21 Century. POSI – Lock 18 – 24 gauge, red, Bulk Pack of 20. 18 – 24 gauge wire, diameter 5 mm, Length 19 mm, maximum insulation diameter is 3.2 mm.