Ohaus Corp.’s Hand-Held scales are available in a standard model version with basic grams-only weighing as well as two professional models, which have multiple weighing units and feature standard four-button operation and a backlit display. A protective cover that doubles as a scoop is a standard feature. Model HP320 can weigh up to 320 grams. The scales can be used to weigh gems and metals. Ohaus Corp., 29 Hanover Rd., P.O. Box 900, Florham Park, NJ 07932-0900; (973) 377-9000, fax (973) 593-0359.

The Ultrasonic Gem Saver, an insert that helps eliminate the problem of retrieving gems dislodged from their mountings during ultrasonic cleaning, fits most standard ultrasonic cleaning tanks. A fine mesh on the bottom of the soft-coated unit captures gems so jewelers need not search or drain the tank to search for gems; it also prevents jewelry items that slip off the racks from being scratched by the stainless-steel tank. Wilson Brothers Products Inc., P.O. Box 1, Bethany, OK 73008; (405) 495-4513, fax (405) 495-3870.