NWP gasket set for Stihl Husqvarna 268 and 272. Use this gasket set when changing the piston and cylinder or crankshaft. Kit includes the following: 2 crankshaft seals, 1 crankcase gasket, 1 exhaust gasket, and 1 cylinder gasket. Replaces part number 501522604 except this set comes with the seals. See itemized part list below.