BSA Unit single C15 B25 B40 B44 B50 WD-B40 outer valve springs NOS ex-military

Application: Fits all BSA "Unit Singles" (C15, B40, B44, B50). You are buying a pair (two) outer exhause springs for the Unit BSA. Would have originaly been for the WD-B40 but will fit all unit singles Its just teh outer springs, no inner springs.