Features and Benefits: Temperature compensating Obtain direct accurate readings Designed so that anyone can see the state of the battery acid Wide range of 1.100 - 1.300 sg. Unbreakable E-Z to read economical Guaranteed 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.