Heavy duty bands / Industrial rubber bands offer much more tension and a longer life expectancy. Although NOT UV resistant the wall thickness is nearly 3 times that of a standard rubber band (as can be seen in the 1st picture), which takes the band much longer to degrade and eventually snap. These bands can be used for any general application to give a strong hold and are also ideal for uses such as: - keeping shoe-box lids firmly closed. - Container liners (hanging clips). - Tent pegs. Sizes are measured as standard. Laid flat length (x) width of the band (x) wall thickness. Packed in bags of 20.