2015 Kannastör presses are constructed with 100% hardened 60 / 61 aluminum. Aluminum dowels handle the pressure of endless use without fail and allow entire press to be heated to 175* to cure pollen disc. 100% food safe and Medical Grade Triple dowel system allows pressing of two discs at one time. Tolerances to 1/1000th of an inch Two sizes. Perfect for 1g or 2g pollen discs. Kannastör quality and Limited Lifetime Warranty.