THIS RING SET IS FOR ONE PISTON DESIGNED TO FIT ONAN ENGINES WITH 3 1/4 BORE THAT USE PART NUMBER 113-0310 .STD  PISTONS RING SET THIS HAS A .058 TOP RING FOR OUR TYPE OF NEW PISTONS .THAT IS MOST OF YOUR B43 B48 AND LOTS OF YOUR P MODELS THAT HAVE HAD NEW PISTONS PLEASE CHECK YOUR PART NUMBER BEFORE ORDERING . THESE ARE DESIGNED FOR EXTRA OIL CONTROL IN USED CYL.AND WILL FIT YOUR OEM PISTONS .WE USE HASTINGS RINGS

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