DSLRKIT Flash PC Sync Splitter Cord Cable 1 PC Male to 2 PC Female Socket w/screw lock Professional Flash PC Sync Splitter Cord . The materia of the port is copper with gold plating,it has a very good contact and never oxidated. It has a screw lock,so the cable can be locked with the pc socket of the camera. Cable length: 120mm(4.7inch ) Suitable for : compatible with screw lock PC sync port, eg: CANON 580EXII 7D 5DII 50D 40D 30D 20D 10D 1D... NIKON D300S D300 D200 D100 D700 D3X D3S D2X D2H D1 SC-15 SB-900,800,80DX,29s, 29,28DX,28,27,26,25,24,22s,22,20,17,16,14,11,140... YONGNUO RF-603 PIXEL TF-321 TF-322 TF-323 TF-324 TF-325 compatible without screw lock PC sync port, eg: DSLRKIT PT-04 PT-04NE... YONGNUO PT-04TM... Seagull SC-2 SC-5 SC-6... Please make sure that take off the plug vertically in unlocked status, the misoperation may cause damage