Studio-Assets 15 lb Sand Bag (Empty) Tripods with Heads The user-replaceable flash tube is

The user-replaceable flash tube is color-corrected to daylight Kelvin temperature

quick-release connection

and one which doesn't

The Optical Slave Converter supports manual exposure modes as set on the attached DS strobe

From setting up

Studio-Assets 15 lb Sand Bag (Empty) Tripods with Heads The user-replaceable flash tube isStudio Assets 15 lb Sand Bag (Empty) Studio Assets SKU: SA3012 Helix SKU: SA3012 Overview Empty sand bags are perfect for travelling. They can be filled with sand, shot, or gravel on location providing up to 15 pounds to use as a counterweight on a boom or to hold down stands. The saddlebag design features two compartments that can be easily filled and zipped shut. The zippers are protected with a secure, hook and loop flap. Specifications SKU SA3012