HUSQVARNA 371 K 371K 372 EPA Piston Ring Set Rings Kolbenring 50MM 503 28 9 036 | Aftermarket PISTON RINGS-Replaces HUSQVARNA Part Number: #503 28 90-36 Fits HUSQVARNA 371, 371 EPA, 371K, 371K EPA, 372 EPA models This kit consists of 2 (TWO) Piston rings: (50MM x 1.2MM) Estimated Time of Delivery from Singapore: 7-16 working days