It was used for installation of a 20-degree earth leakage circuit breaker.
It seemed that the dimension was slightly longer in the vertical direction, but it was perfect size when wiring connection was done. The wooden panel is enclosed in the mounting part and it is a very good product.
Speaking of Wal boxes, if you buy things of the future industries, I wonder if there is any mistake. There are small kinds such as color / size and key, and it is very appreciated as a trader. Durability is also ◎