This miniature light bulb is for use in most later Hoover uprights. It is only 3/4" in diameter and about 1 1/2" long. One end is flat with wires which make contact when it is pushed straight into the light socket. For earlier uprights and power nozzles which use a bulb having a metal base that locks in with a twist (bayonet style), see 25 Watt ....   Show More