Accurate within three gravity points Floats are molded in house accuracy protected against changes in temperature humidity injection pressure and molding variables Float counter weights accurate within 000 10 of an inch Inspected by hand for appearance and leakage Includes Temperature compensating Obtain direct accurate readings Designed so that anyone can see the state of the battery acid Accurate range of 1 100 - 1 30 Unbreakable Easy to read Economical Unbeatable quality Used by battery manufacturers worldwide Item weight - 2