GENUINE STIHL MS251 18" REPLACEMENT CHAINSAW CHAIN .325" PITCH .058" (1.5mm) GAUGE 68 DRIVE LINK COUNT FULL CHISEL CUTTERS THIS FITS STIHL MS251 18" CHAINSAWS FITTED WITH A 04 LIGHT BAR ONLY IF YOU ARE UNSURE IF THIS IS SUITABLE FOR YOUR CHAINSAW PLEASE CONTACT US AND WE WILL BE ABLE TO ADVISE.