When vieing gems through the Chelsea filter only deep red and yellow green light can pass through the filter enabling you to distinguish emeralds from imitations, also exam ruby and sapphire with the Chelsea filter.Our Chelsea filters are made from high quality materials and finished in any colour of your choice,we also offer free company logo rinting which is excellent for advertising.Chelsea filters with your company logo on them are perfect promotional gifts for your business!DK91004
Size:53mmx33mmx14mm