Herring fish belong to the family Clupeidae, which contains nearly 200 species. They are small, streamlined schooling fish that feed on plankton and live in both freshwater and saltwater.Herring have a single dorsal fin and protruding lower jaws and are silvery in color.erring fish belong to the family Clupeidae, which contains nearly 200 species. They are small, streamlined schooling fish that feed on plankton and live in both freshwater and saltwater.
DRUG DESCRIPTION. ESTRINGÂ® (estradiol vaginal ring) is a slightly opaque ring with a whitish core containing a drug reservoir of 2 mg estradiol. Estradiol, silicone polymers and barium sulfate are combined to form the ring.hen placed in the vagina, ESTRING releases estradiol, approximately 7.5 mcg per 24 hours, in a consistent stable manner over 90 days. ESTRING (estradiol vaginal ring) has the following dimensions: outer diameter 55 mm; cross-sectional diameter 9 mm; core diameter 2 mm.
Ordinarily (however not always) a groove is dug into the shaft or bore, and this groove becomes the seat for the retaining ring. Retaining rings are designed such that their contact diameter has some interference fit with the groove in which they fit. This creates a âsnugâ fit between the ring and groove. The term used to describe the amount of interference fit is âclingâ. Cling causes the retaining ring to fit tightly and securely against its groove bottom. Without cling a ring would have a loose fit and would ârattleâ in its groove.