18" 228BPX .325" Pitch .063" Gauge Pro-Guard Chisel C-Loop Chain. It is compatible with Stihl 025, 025C, MS 230, MS 230 C-BE, MS 250, MS 250 C & MS 250 C-BE. This low kickback chain meets ANSI standards and is UL classified for safety and great performance. It cuts faster, stays smoother, and stays sharp to get the job done.