Babe Bee type engine with "horseshoe" type Delrin backplate and brass needle valve. The ROG Phone has a metal chassis with a glass backplate. SPAD indicators are mounted against a blue backplate or surround. It has a black, plastic backplate that is not user-removable. It consisted of a breastplate and backplate with laminated thigh-guards called tassets. The gorget was often strapped to both the breast and backplate of the cuirass. The harness supports the backplate and its cargo on the diver. Fifth generation iPods have their battery attached to the backplate with adhesive. The phone was available with a black, silver or bronze-coloured border and backplate. Other types of BCD exist which more resemble backplate and wing BCD. The backplate and harness forms the foundation of the DIR diving equipment system. The conventional distance between centrelines for bolting to a backplate is . The distance between boltholes on the centreline of the backplate has standardised at between centres. Cadmium telluride solar cells are often deposited on a backplate of molybdenum. The light of the candle flame was often intensified by a reflecting backplate.