Chain tensioner, Stihl 021-023-025, MS160-180-210-230-250 , Side-adjust.

Stihl :  017, 018, 019T, 020T, 021, 023, 025, 025C, MS160, MS170, MS171, MS180,MS181, MS180C, MS181C, MS190T, MS191T, MS210, MS210C, MS211, MS230, MS250, MS250C, MS271, MSE140C, MSE160

Stihl 1123-007-1000 , 11230071000