Gold Test Needles-Set Of Five-10K-14K-18K-22K & .999 Silver Clasps Compatible with the Otto Frei

Compatible with the Otto Frei economy rolling mill and many other economy mills made in India

The graduated dome variations allow for refined control over the depth and curvature of your formed pieces

the M-105 produces a pronounced concave shape on sheet widths up to 1-1/4" (31mm)

Sold in a pack of six

71 mm Pack Length 60" (5 ft

Gold Test Needles-Set Of Five-10K-14K-18K-22K & .999 Silver Clasps Compatible with the Otto FreiGold test needles are an essential tool for jewelers and precious metal buyers who need to assess the karat or fineness of gold and silver items using acid testing methods. This set of five needles covers the most commonly encountered gold karats and a fine silver standard, giving you reliable reference marks for side by side acid comparisons. Features Set of five test needles covering four gold karats and one silver fineness Includes 10K, 14K, 18K,