Poulan Gasket part# 019053 supersedes to part# 530-019053. This gasket was used on the oil pump assembly of the following chainsaw models; S25AV, S25DA, and S25. 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.