Annular chain sprocket assembly 0.325" 8d. Optional. For models: MS 240 MS 260 MS 260-W MS 260 C-B MS 260-D 024 024 S 024 SW 024 SWVH 026 026 W 026 WVH 026 C. Includes: Disc Ø 27 mm, Safety washer 8x1.3, Annular chain sprocket 0.325" 8d