... also are available:1-way box,2-way box(Straight box), angle box, 3-way box(Tee box) Size:60.3mm Internal Diameter20mm ... and Public Housing Projects. Models and specifications: Back Outlet Box J20B00 20mm, Hot drip zinc J20B00-B 20mm, Black ... zinc J25B04-B 25mm, Black Enamel Angle Back Outlet Box J20B2A 20mm, Hot drip zinc J20B2A-B 20mm, ... drip zinc J25B2A-B 25mm, Black Enamel conduit box,circular box