POWERPART C-Line Range. Bagged with Header card. 1 x C-Line 1 Way Base Plate LP Range. Ultra Slim 3.5mm profile with reliable clip-in system Required with all LP 1 Way Face Plates. PO511 PO515 & PO521 C-Line is a modular range of wide range of electrical Components & Facias that mix and match to suit whatever your requirement you have.