Relive the precision and charm of classic British engineering with the MännerKraft M20-TZ-V4 Stirling Engine. ●Educational & DIY value: Illustrated manual included for hands-on assembly. ●Technical authenticity: Four 20MM GCR15 steel cylinders with CNC-machined pistons, hardened to 58-62 HRC, ensuring high durability and precise ±0.005MM tolerances.
