... " SHAPE Channel ,angle bend, outter bend sizes: 16*16, 25*25, 25*40,50x50, 1) cable trunking accessories ... ,2) inner trunking ,3) "T" SHAPE Channel ,4)angle bend, ... outter bend 5) sizes: 20*10 , 24*24, 39*19 cable accesories6) ... suffer from biotic attack5) Protects wire and cable from easy damage6) Installation during the process ...