This is a light spring option. For the medium spring option, use M526665N and M526664N for heavy spring.Includes: M3620411 (Captive PTO Disc)The M526666N 11" Dual Stage Pressure Plate - New fits equipment brands such as: IMT, Massey FergusonThe M526666N is a substitute for the following discontinued products: M526666R
Includes: M1043282 (Captive PTO Disc)The M532319N 11" Dual Stage Pressure Plate - New fits equipment brands such as: Massey FergusonThe M532319N is a substitute for the following discontinued products: M532319R
Includes: M1043282 (Captive PTO Disc)The M532320N 11" Dual Stage Pressure Plate - New fits equipment brands such as: Massey FergusonThe M532320N is a substitute for the following discontinued products: M532320R