Manufactured by Namura Kit includes piston, rings, pin, clips, wrist pin bearing top end gasket kit you get exactly what is pictured Cast piston has super-high silicone content for additional strength Piston skirts are Molybdenium Teflon coated to minimize resistance/wear and provide extended life Piston dome is anodized for superior heat resistance and longer lifespan Namura gaskets use performance materials to increase durability and provide greater reliability Includes all gaskets pictured to rebuild top end Kit is for standard bore size 39.50mm Size A piston is 39.46mm Made in Taiwan Fits 2009 KTM 50 SX 2010 KTM 50 SX 2011 KTM 50 SX 2012 KTM 50 SX 2013 KTM 50 SX 2014 KTM 50 SX 2015 KTM 50 SX 2016 KTM 50 SX