Although these adapters are made of unmolded, high temperature plastic as shown in the photo, they are of high quality and cost $1.25 each, which is the best buy on the web. Please note that these adapters are used to fit a candelabra lamp into an intermediate socket. Also, they add about 0.6 inches to the overall length of the lamp due to the thickness of the base. All joints are well soldered, the brass is bright and crisp, and the inner insulator looks like resin-impregnated fiberglass. That