THIS IS A REPLACEMENT PISTON IT IS .010 FITS NH NHC P224 T260 MOST ONANS WITH  3 9/16 BORE THESE ARE .010 OVER DOES  INCLUDE RINGS ,THEY ARE LISTED IN OUR STORE AT 21.95 THEY ARE 0296   THESE WEIGH THE SAME AS OEM THAT ARE NEW.THESE ARE NOT ONAN OEM PISTONS.THE PIC SHOWS 20 BUT THIS IS A .010 OVER

We always combine shipping but you must wait for an invoice if you want to save some money.