Maratac UGM Tough Patch 3x2. 13". Glow in the Dark epoxy resin bar. Recharges by absorbing light from any light source. Can be used as emergency markers or for tagging gear. Glows up to 24 hours. Bulk packed. Specifications for Maratac UGM Tough Patch 3x2: Manufacturer: Maratac Gender: Unisex Height: 2 in Length: 3 in Dimensions: 3 x 2 x 0.13 in Package Contents: Maratac UGM Tough Patch 3x2