For Siros S 400/800 Monolights_400/800ws_replacement 400-800 w/s flashtube_The Standard 400/800Ws Flash Tube for Siros S 400/800 Monolights from Broncolor is a replacement flash tube and is easily installed into the 400 and 800 series Siros lights._Specifications Weight: 0.06lb / 0.03kg Product Height (in): 2.6 Product Length (in): 2.68 Product Width (in): 2.64 Product Height (cm): 6.6 Product Length (cm): 6.8 Product Width (cm): 6.7 Read More