... )fireproof safe heatproof 4)all kinds of surface box 1)Model: CY2042)Material: PVC surface box3)Sizes: 3"x3" ( 75x75x38mm) box ;3 ... your requirment Features: we are manufactures all kind of pvc surface box , junction box , switch box , elecrical box . 1) good insulation ... occurs like metal pipe, resistant to acids,alkali and oil3)surface box no smell attracting rotent, will no suffer from biotic ...