Two new chains to fit a Stihl MS250 with an 18 inch bar. The Stihl chain is triple humped semi chisel safety chain .325 pitch, .063 gauge, 68 drive links. The Windsor is full chisel, non safety, .325 pitch, .063 gauge, 68 drive links, 63J68. Both are high quality chains. $28 cash 620-755-822six