Gasket and Diaphragm Kit Fits:

RBC221 String Trimmer
RBC251 String Trimmer
RBC252 String Trimmer
RBC253 String Trimmer
RBC255 String Trimmer
RBC256 String Trimmer
RBC25A String Trimmer
RBE250 Edger

RBL250 Blower

RST250 Gas String Trimmer