46 CFR 160.041-2 - Type and size.
(a) Type. First-aid kits covered by this specification shall be of the water-tight cabinet carrying type designated as Type II, Grade A, class B by Federal Specification GG-K-391. Alternate arrangements of materials meeting the performance requirements of this specification will be given special consideration.
(b) Size. First-aid kits shall be of a size (approximately 9″ × 9″ × 2 1/2″ inside) adequate for packing 24 standard single cartons (defined by National Bureau of Standards Simplified Practice Recommendations for Packaging of First-aid Unit Dressings and Treatments), or equivalent combinations of single, double, or triple cartons, the arrangement of the cartons to be such as to permit ready access to each item contained in the kit.