... length rectangular busbar, double-T Universal bus bar frame , , is used for bus bar of 12,15,20,25,3*5/ ... - bus bar frame, is used for busbar of 12,2,30*5/10 Bottom groove , suitable for UL - bus bar framePE/E ... -bus bar frame, is used for 12,15 ... ,20,25,30*5/10Bus bar frame with connection terminal , is used for 12,15, ...