This Wiseco Piston Kit is for Husqvarna CR 250 and WR 250 years 1999-2004.  Comes with Ring Set, Pin, and Clips. The stock Bore x Stroke is 66.4mm x 72mm.  The only Bore size available for Husky CR/WR 250s is the stock 66.4mm bore.

Don't forget to purchase the Complete Top End Gasket Kit with the Top End Bearing to finish your rebuild properly.

*Note: Top End Gasket Kit is ONLY for years 1999-03