Coloured Grip Seal Bags - Resealable polybags with gripseal interlocking closure which can be used over and over again.  The grip seal closure ensures the bag stays firmly shut once sealed, protecting the contents from dirt and moisture.   Very cost effective and easy to use.  No expensive heat sealing equipment required.  Provides a secure container.   All gripseal bag sizes are quoted in inches, if you want to know the equivalent size in mm, just multiply the figure by 25.4.