As for years; Topppp service, quick uncomplexed handling and very friendly communication! \ R \ n \ r \ n \ r \ nSince years, we use these moisture stones - there are simply no better ones! \ R \ nThey last very long and the price at SVB is unbeaten! \ R \ n \ r \ nWe also tried some granules - no comparison to these stones. Granules dissolve quickly and you have to, despite favorable in purchasing, constantly renew. \ R \ n \ r \ n \ r \ n \ r \ nWish to do something good for his \ "good and good \" - here's the solution! No bad room air, no humidity in the rooms - and in a wooden house! \ R \ nThanks to SVB and we hope that these stones are still available for a long time.