Milliard Floating Pool Thermometer Rubber Duck, Large Size with String, for Outdoor/Indoor Swimming Pools, Hot Tub, Spa, Jacuzzi and Pond, Yellow Thermometer is 7 tall and reads in both F and C Includes rope tether to keep the thermometer from floating away Duck-shaped top adds fun and dcor to your pool Made from durable ABS plastic to last from season to season No more guesswork with accurate temperature readings