The highest quality Red Sable hair used as bristle for these brushes provides a soft yet resilient brush that does not mat or become limp when wet. The specially contoured handles proved a comfortable and secure grip. Their long life makes them a most economical brush to use. Large One end has hairs 5/8″ long. The other end contains a still larger cluster of 1″ long, stiffer white bristles. Both ends are used in applying investment materials, especially to the gingival and interproximal areas, when flasking full and partial dentures.