Bonded clutch friction plates, Suit Norton AJS Matchless AMC clutches approx 1961?+, Surflex, Made in Italy. Norton /AMC clutches had a mixture of bonded friction plates, and steel plates + a half and half plate. Friction plate tangs go in.50 = 3 x bonded plates + 3 x plain plates + 1 x bonded end plateES2, 88, 99 = 4 x bonded plates + 4 x plain plates + 1 x bonded end plate650 = 5 x bonded plates + 5 x plain plates + 1 x bonded end plateNote: These plates will NOT suit the Norton Gearbox pre AMC.Original Part No:21259;043192 - Clutch friction plate with inserts suits all models approx 1961+.