Replacement 50cc piston ring for the Honda Hobbit PA50, PX50, Camino, NU50, NC50, NA50 mopeds. As well as the Batavus m48, Trac and some Benelli's too.
Use the ring expander on the bottom ring. These help reduce piston slap noise. Better, worse? Some say don't bother as they increase risk of a part failure.
40mm x 1.5 GI