SETS OF DIODE FOR EP UNIT MODIFICATION. 1 ) ZENER DIODE, TYPE NO. 1. 5KE 56A. MAKE- VISHAY, TEXAS, PHILIPS OR SIMILAR. QTY = 01 NO. 2 ) AVALANCHE DIODE, TYPE NO. SKA 3/ 17. MAKE- SEMICRON, GE, HIND RECTIFIER OR SIMILAR. QTY = 01 NO. ( ONE SET CONSIST OF TWO ITEMS ). ( MATERIAL TO BE PROCURED FROM OEM OR ITS AUTHORIZED DEALER AND MAY PLEASE SUBMIT PROOF OF PURCHASE ).