Artstraws® are 15.5" paper straws used for engineering and construction, as well as arts and crafts projects. Artstraws can easily be combined with glue, or simply pinching and threading it into another Artstraw. No connectors are needed. Assortment includes Red, Yellow, Blue and Green straws. Each package contains two instruction books, one for arts and crafts and one for design and technology. This assortment contains both 4 mm and 6 mm wide straws.