When purchasing Redding or any other brand from eGoods365.com store, you can be sure that (a) you are purchasing from US based company with the most responsive and friendly customer service; (b) an authentic, not a counterfeit and not a refurbished product.
The Redding Powder Trickler works extremely well. Turn the knob and you can add powder to your scale one or two granules at a time. Brings underweight charges up fast and accurately. The Trickler weighs a full pound so it won't move all over the bench while in use.