For use with:
MS 441 C-Q (Chain tensioner), MS 440 (Chain brake, Chain sprocket cover), MS 441 (Chain tensioner), MS 440-D (Chain brake, Chain sprocket cover), MS 441 C-M (Chain tensioner), MS 390 (Chain brake, Muffler), MS 391 (Hand guard, Chain brake), MS 290 (Chain brake, Muffler), MS 441 C-M W (Chain tensioner), MS 310 (Chain brake, Muffler), MS 441-W (Chain tensioner), MS 311 (Hand guard, Chain brake)