tender for 10000559612089107012010disco-flex coupling lm520/180 - disc-o-flex coupling complete assembly,model: rlm 520/180 of lovejoy brand or exact equivalent with finished bore as below. bore-1: 95 mm, keyway 24.5x5 mm and bore-2: 79 mm, keyway 22x9.5 mm (utility area requirement)