OTF Automatic Knife Waterproof Box for storage case. CobraTec Waterproof OTF Automatic Knife carry case box for CobrTec Knives. Knife is not included. 1 Black OTF Automatic Knife Waterproof Box. 6.5 inches x 4.15 inches x 2.17 inches. The item “CobraTec OTF Automatic Knife Waterproof Box for storage case” is in sale since Friday, November […]