This eye loupe features a distortion free, three piece, bonded lens made from optical glass, color corrected with a working distance, This chrome finished loupe easily folds up to protect the lens when not in use. Includes leather carrying case. - Inspection Loupe with color corrected triplet 18 mm lens for close up inspection, distortion free, three piece, bonded lens, made from optical glass, chrome finish loupe easily folds up to protect lens.