This item is a Mitronix G4-R41.
This two pin socket fits models: GY9.5, GZ9.5, BVE, DYV, EKD, DDJ, DDP, DZE, EKL, DZT, DYG, FDS, FDT, FMR, DYR, EHA, FGW, DYS, EKB, and BHC ANSI coded bulbs."
This QEW-1 is a halogen socket. It is compatible with GY9.5 and GZ9.5 base halogen lamps.
The rating for this socket is 300 volts, 10 amps, 100 watts."
This QRX-4 socket is designed to be used with G4, GZ5, and GX4 base halogen lamps.
The rating for this socket is 125 volts, 10 amps, 100 watts."
The G53 socket is designed for AR111 halogen and LED lamps.
Each piece can be secured to a surface and wired to power source. The lamp slides into the slots on the lampholder."
This lamp socket fits ANSI coded, high and low voltage bases that are oval pin, round pin, G5.3, GX5.3, GU5.3 and GY5.3"
QHV-1 socket fits high voltage, ANSI coded, GY5.3 flat pins base.