Poulan Piston Ring part# 027482 supersedes to part# 530-027482. This ring has a diameter of approximately 1-1/2 inches. This ring is listed as "No Longer Available" by the manufacturer. Following is a list of chainsaw models that use this piston ring; 2300AV, 2300CVA, 2350CVA, 235 Pro, PP180C, PP235, PP236, and PP236C. There may be models that use this part that we do not have listed here. Please refer to your owners manual or a parts breakdown for your model, to assure that this is the correct part for your machine, before you order.