Blank piston for SO/MO f13mm Shock 1.5mm thick
Blank pistons for off-road f13mm shocks, available in three different
thicknesses from 1.5 to 2.5 mm, with thinner pistons operating softer and
thicker ones tasting more hip. Piston holes can be drilled freely with a pin vise, etc. but guide marks are provided so that 2 to 6 holes can be drilled in neat alignment.