CONTROLTEK - CNK585048 High-Performing Security Bags for banking help reduce losses from theft while at the same time improving efficiency of your vault and cash transport operations. Patented, triple-seal closure with interior adhesive leaves no openings once sealed. High-visibility void message reveals tampering attempts. Aqua detect ink reveals exposure to fluids. Special thermochromic ink turns red when subjected to heat. Security microperforation immediately reveals attempts to pull closure up. Anti-static liner does not cling to hands and clothes, speeding up processing. Large serial numbers and bar codes allow easy tracking via CCTV. Security border and micro printing prevent cutting and resealing. Capacity is 4,000 bills or four bundles. Bags are made of polyethylene.