Giffin Tec - Large Lidmaster

Outside/inside measuring calipers for potters. Measure the inner dimension of a vessel’s opening and the Lid Master automatically produces the outer dimension needed for a lid. Easy to read indicators show precisely how many inches the lid will need to be and a second pivot location produces a 12.5% ratio that’s similar to the shrinkage rate of fired clay. Measures from 0-16.5 inches