A UNI multi clutch O ring, shim & circlip set (supplied as a spare part)
Please note that this O ring, shim and circlip set is only suitable for use with a UNI multi clutch and use with modern type performance clutches i.e (cartridge clutch)
Kit consists of 
2 off shims 18x12x1mm thick 
1 off 12mm "E" clip 
1 off 12mm external circlip 
1 off 10mm external circlip 
1off 12x2.5 O ring