This is a Profoto Replacement 250Ws Flashtube for the D1 Monolight.
Most current, professional flash heads and monolights are equipped with user replaceable flashtubes that may simply be plugged into, and unplugged from their sockets. With proper handling, these flashtubes may last for tens of thousands of flashes under normal use.
SmallRig Adapter Part for Sony FX30 / FX3 XLR Handle MD4019
Profoto Flashtube D1 1000 Quartz 




