Proline® Set anelli pistone per Husqvarna 545 550XP 577958301
577 95 83-01, 577958301. Proline® piston rings for many Husqvarna 545 and 550XP chainsaws. Rings are Not made in China. Husqvarna : 545, 550XP. Replaces Husqvarna OEM # Piston ring (2pcs). Type of end gap: side pin as shown.