Transformer rated meter sockets. 4 jaw. Circuit closing on left side. CL4-V 20 AMP TRANSFORMER RATED CIRCUIT CLOSE LEFT
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Brochure
https://static.graybarcanada.com/Generic/id-bro-v1-20-a-600-v-cl-ab-ct-ct-swl-series.pdf
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Spec Sheet
https://static.graybarcanada.com/Products/Service%20Entrance/Service%20Ent%2C%20Meter%20Sockets/MICCL4V/Files/MICCL4V_Files.pdf