IMPELLER; TYPE: BOSS, DIMENSIONS: AS PER DRAWING, MATERIAL: SC450(A27); PN:20, 21, 22, 23, MFR: HYUNDAI ROTEM; MODEL:TA-IAD #13, MFR:HYUNDAI ROTEM, DRAWING: MD-451-5385-EG-ME-GEA-16002 HYUNDAI ROTEM, DRAWING: MD-451-5385-EG-ME-DIAL-16364 HYUNDAI ROTEM, TO BE SUPPLIED AS ASSEMBLY WITH MAIN PLATE(1 PIECE, PART #20-SS400), SIDE PLATE (2 PIECE, PART#21-A572-65) AND VANE(11 PIECE, PART #22-A572-65 AS A SET AS PER DRAWING