This Metrel-style 4-pin connector block is designed for single-phase AU plug test leads compatible with a range of Metrel installation and RCD testers, including:
- Metrel 2121
- Metrel 3122
- Metrel 3125
- Metrel 3125B
- Metrel 3125BT
- Metrel Instal Test 3017
- Metrel 3105
- Metrel Instal Test XC 3152 (Eurotest XC)
- Metrel Instal Test XD 3155 (Eurotest XD)
