Hey I bought mine at a swapmeet when I was in Cali, but the actual name I believe is a hanging letter scale, its metal. it works good for me. You can make sure its right by weighing a nickel and it should be 5g. I love your buds. Looks real good. Smokin' it yet? I harvested yesterday after checking the trichs day before and I seen about 50% cloudy and I also saw sum amber trichs. I harvested 100g wet weight. Not too shabby for my first indoor. Smells real good. I have been reading about hydro at my library, and I am gonna do soil and hydro at the same time in about 2 months that way I can be moved in my new place and build a proper grow room. Here is pics of my harvest and the scale so you will know. I just weighed my two colas and they have already lost 9g ea. So now they are 16g ea. besides the other 17 buds. My camera kinda sucks, I only bought it for $20.