More information· Stable up to 70 ° C · Developed especially for summer, but also for high temperature workplaces · This solves a common problem of standard mines, which are more sensitive to higher temperatures and can soften around 30- 40 ° C. · For most surfaces except smooth / shiny For recharging or changing · Rectangular leads with 2x5 mm section and 150 mm long · 12 replacement leads in case for safe storage · Sturdy and easy-to-handle plastic case for its double opening