... :We are manufactures all kinds of pvc outlet box , electricl box , switch box , junction box ,cavity box and son on .1)Easy to equiped ,long ... damage or ruin5)No rust occurs like metal pipe6) Switch box with no smell attracting,will no suffer from biotic attack.7 ... damage 11)bend pipe fittings with no smell attracting to rent ,will no suffer from biotic attack pvc outlet box with 3x3 ,3x6 ...