Festoon Socket fits 1 3/4" or 41-44mm. The tabs are solderable. The plastic housing has a mounting hole so you can mount the socket. The mounting hole diameter is 0.161". The mounting hole larger diameter is 0.314" for the screw head. Rated up to 250 volts. Rated up to 25 amps. The base is 1.625" long. The base is 0.468" wide. The mounting hole head diameter is 0.319". The mounting hole diameter is 0.168". The overall height is 0.795". The soldering hole terminals diameter is 0.055" The product is CE listed.