Our cluch can be used in Bitzer(4N.4U.4T.4PFCY),Bizer F400Y, F600Y,Bock, DKS-32 and so on.You are welcome and contact us freely over the past 24 years,our cluth are widly sell in over 60 bus manufacturer and oversea, which can be usded longtime with lest problem.Your info. and suggestion are welcome.Contact us at: miachael at jingyikt dot com. 12/24V electromagnetic clutch for DKS-32 compressor