Hayter pulley washers plain m12 hy09485two washers for use with hayter pulley half one between halves one outside.suitable for the following modelsharrier 41 305lharrier 41 305nharrier 41 305pharrier 41 305rharrier 41 306lharrier 41 306nharrier 41 306pharrier 41 306rharrier 41 307lharrier 41 307rharrier 41 308nharrier 41 312lharrier 41 312nharrier 41 319rharrier 48 480rharrier 48 481rharrier 48 488tharrier 48 488shawk 308nhawk 312njubilee 422njubilee 423njubilee 424nreplaces zwq1l000uplease check your model code before ordering.the hayter model code is found at the start of the serial number or on the model sticker plate on the mower, always 3 numbers a letter, such as 419n