This is a A-B1A2513P Timber Ridge, 5/32" 3 Pack Files, 4 MM PN: B1A2513PMain Description As Following : A-B1A2513P Timber Ridge, 5/32" 3 Pack Files, 4 MM P.N: B1A2513P Our popular files, now in a 3 pack.Size: 5/32", 4.0 mm Found in Section & Models : Sunbelt - Chainsaw & Forestry > Chainsaw Tools, Timber Ridge SAW CHAIN FILES: SEVERAL Associated Items : A-B1A2523P, A-B1A2533P Also This is An Aftermarket Product And : Size: 5/32", 4.0 mm