3.2mm Glowire has a UV protection and an extra layer of PVC coating for protection. Good for outdoor use or the Glowire needs extra protection. Price is per foot. The initial shopping cart will allow you to select only up to 30' of Glowire however if you wish to purchase longer lengths just order the same color multiple times. For instance if you want to order 50' just order 30' and then order 20' of the same color.