The 1394 adaptor 6 pin (6 circuit Firewire 400) female to 4 pin ( 4 circuit Firewire 400) male (Alternative) would be typically used to convert 6 pin to 4 pin for devices such as camcorders. Please note : While these adaptors have been given USB part codes these are firewire only. Please check wiring specification before ordering as there are difference between the 910 and 910A. Specification Firewire 400 adaptor 6 Pin Female - 4 Pin Male Nickel connectors Firewire Adaptor 6 Pin Female - 4 Pin Male