Piston rings (diameter 39.88mm / thickness 1mm) - Aprilia RS 50 ('06-> / DERBI D50B) / RX-SX 50 ('06-> / DERBI D50B) - Polini

piston rings (39.88mm / 1mm) Polini for the following applications: Aprilia RS 50 (2006-> / DERBI D50B) / RS4 50 (DERBI D50B) / RX-SX 50 (2006-> / DERBI D50B) / Derbi GPR 50 Racing (2006-> / DERBI D50B) / Senda 50 DRD / SM (2006-> / DERBI D50B) / Gilera RCR 50, SMT (2006-> / DERBI D50B) / Valenti Racing RME, SM (DERBI D50B).

Chrome piston rings for cast iron cylinder.

Technical specifications:
- Piston diameter: 39.88 mm;
- Thickness: 1 mm.