Single part clear Acrylic Resin that requires no mixing! Cured hard within minutes under UV or direct sunlight Non-yellowing, Extremely easy to use, Environmentally friendly. Excellent for jewelry making, fly tying, DIY fishing lure, open back bezels, bezel setting, small silicone molds, coating for shrink plastic paper, etc. Suitable for making small size ornaments, necklaces, bracelets, pendants, bracelets, rings and so on Curing time: UV-LED (6-9W): 2-3 minutes UV Lamp (36W): 2-4 minutes Sunlight (sunny day): 8-10 minutes Sunlight (cloudy): 20-40 minutes ALL sizes are inclusive of nozzles for easy application Specification: Material: Acrylic Resin (not Epoxy Resin) Type: Hard Type Bottle Color: Black Liquid Color: Transparent Clear Package Includes: 1 Bottle UV Glue(2 Pack) Note: Conversion: 1inch=2.54cm, 1cm=0.393inch Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience!