Pixel Super Long 33ft 10 Meter E-TTL Off-Camera Flash Sync Cord for Canon EOS 1D, 1D Mk2, 5D, 7D, 20D, 30D, 40D, 550D, 500D, 450D, 400D, 350D, 300D Digital SLR Cameras & 580EX II, 430EX II Flash as OC-E3 The cable is coiled and the cable length is about 10 metres, but the practical length is less than 10m. Compatible with all Canon EOS cameras except the 630 and RT The UNC (Unified National Coarse Thread) of tripod socket is 1/4" Make sure you install the cable correctly (refer to product pictures) Compatible with Canon Speedlights and other brand Canon fit flashguns.