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.
Sony E-Mount 18-135mm F3.5-5.6 OSS Zoom Lens
Profoto RFi speedring adapter Broncolor Pulso 




