1.gift invisible pen 2.its a novelty pen 3.colourful logo ... for promoting goods and advertisementDescription:1.Permanent, waterproof, 2.heatproof, non-toxic, environmental-friendly, 3.competitive both ... business of promotional gift pens,such as: Invisible uv pens,Bingo daubbers,Highlighters,and gift ballpoint pens. ... for anti-counterfeiting use or promotional gifts 2012 Hot selling uv marker CH-6001