The SK-3S, SK-4S and SK-5S formats all use the same design and materials used in the SK-1S and SK-2S formats, and have exactly the same advantages for efficiently collecting buccal cell samples.
Like the SK-1S, you can quickly snap the shaft at the breakpoint if you wish to store the swab in a tube. If this is your preferred method, Cell Projects has available pre capped tubes that can be ordered with these formats.
SK-4S: 2 Buccal Swabs per wrapper