Heavy Duty Straight Cords (1 Foot Straight ) 2-1S Household to PCHousehold (HH) Two Prong Plug: Fits most professional flashes with dual blade receptacle such as Lumedyne, Norman, Braun, and Dynalite. Also, units with three-prong plug such as Dynalite (3 flat blades), Sunpak and Quantum Radio 4i (2 flat blades with 1 round pin in the center).PC Standard Tip: For most professional cameras. Heavier tip construction provides a snug fit, will not fall out of camera or lens. Not recommended for Olympus, Minolta, Canon or other 35MM cameras, unless you loosen the PC with the “PC Conditioner Plus”.Lightweight cords don’t stand up. They break, they short and their tips get loose, fall out, don’t make contact. Heavy duty Paramount cords feature doubly insulated, heavy gauge wire for strength. Wires within the cords are positioned in parallel to eliminate twisting, knotting, kinking, and breaking, and they're individually stranded and tinned for maximum conductivity. Cord coils keep their spring and elasticity through years of use.These PC Tips are stronger, too. Made of molded plastic with conductors wrapped between metal and nylon bushings, they permit the PC to rotate 360 degrees without breaking. Paramount tips seat solidly for reliable contact.Paramount PC construction represents a significant improvement over traditional soldered connectors, which are brittle and often break. The heavy metal construction on the PC's resists splitting.