medium-touched metal parts made of gunmetal, automatic fine regulating valve for the hydraulic balancing of floor distribution lines for thermal self-regulation, with automatic control range changeover for thermal disinfection, maintenance-free spindle seal, control range 56-58 °C, with shut-off, regulating and presetting function, infinitely shortenable plastic shaft, installation depth max. 110 mm, operating temperature max. 90 °C, PTFE seat seal, PN 16, dead-space free, chrome-plated government head with SW 6 Allen key, purple marking plate