Repti Flex 90W - 10.5m Diam 7mmHeating cords allow you to heat the volume of your vivarium with a moderate investment. Four wattages to meet every need. Easy to install, many options. Excellent for creating a temperature gradient. Waterproof (embedded in silicone to prevent hardening). NB: Avoid leaving it rolled up tightly on the floor, as this could split the bottom of your vivarium. Spread the heat over the floor.