For Select Siros Monolights_Vented for Cooling_Protective Glass Dome_This Protective Glass Dome from Broncolor is designed to protect the flashtube on the Siros 400 and 800-series of monolights._Specifications Weight: 2.87lb / 1.3kg Product Height (in): 2.36 Product Length (in): 35.43 Product Width (in): 4.92 Product Height (cm): 6 Product Length (cm): 90 Product Width (cm): 12.5