Union joint for flush-mounted junction boxes: 2503MG, 2504, 2506, BL02P, BL03P, BL04P
Union joint or coupling device, which allows to keep the boxes at the right distance during masonry operations, for multifunctional junction and socket boxes: 2503MG, SFM3, 2504, 2506, BL02P, BL03P, BL04P