"EB/PN SR30 REPRESENTA A COMPONENT DESIGNED TO TENNSMITH MODELS SR24,SR36 & SR42 SLIP ROLLS/PARTS LIST,THAT HAS BEEN MODIFIED TO MEET REQMTS OF SSN774. SLIP ROLL ASSY IS MANUFACTURED TO 30 INCH WIDTH IAW TENNSMITH DRAWING SR30-SPACE REQMTS. ERH574-1002B24 CHANGES THE FIXED HANDLE TO A RATCHETING HANDLE"