The STIHL 4002 713 9715 Base is a genuine OEM replacement lower housing for the STIHL SuperCut 20-2 mowing head. This part forms the base of the trimmer head assembly, supporting the spool, line feed components, and ensuring correct alignment and performance of the cutting system. Built to STIHL’s factory standards, this base provides durability and dependable service life — ideal for maintenance or repair of worn, cracked, or damaged head bases.