ITEM NAME:Chain Tensioner Adjuster 11230071000 fit for Stihl 025 023 021 MS250 MS230 MS210 Chain Adjuster Screw Tensioner Fit for Stihl 025 023 021 MS250 MS230 MS210 Chainsaw SPECIFICATIONS.Manufacturer Part Number: 1123 007 1000, 1123-007-1000, 11230071000. Chain Adjuster Screw Tensioner Fit for Stihl 025 023 021 MS250 MS230 MS210 Chainsaw. Compatible With: Fit for Stihl 025 023 021 MS250 MS230 MS210 Chainsaw.