Gold Test Needles Set of Five-10K-12K-14K-18K-& 22K Prop 65 - Acrylonitrile-Carbon Black-Lead-Butadiene Sufficient for up to 2

Sufficient for up to 2 refills when used with a Quatro Fume Hood or SolderPure

Lowers the shelf position for improved ergonomics during microscope-assisted engraving and stonesetting

making it well suited for clean

The Monarch requires oil-free compressed air and must be used with a compatible GRS engraving system

Gold Test Needles Set of Five-10K-12K-14K-18K-& 22K Prop 65 - Acrylonitrile-Carbon Black-Lead-Butadiene Sufficient for up to 2Gold Test Needles Set of Five (10K, 12K, 14K, 18K & 22K) This professional set of gold test needles includes five needles, each tipped with a different karat of gold, allowing jewelers and metalsmiths to perform comparative acid testing across the most common gold purities. By rubbing each needle against a test stone alongside an unknown gold item, then applying testing acid to both marks, you can observe and compare the acid reactions to estimate the