Bushbox Coupling Module Connect your own Bushbox with the Bushbox of a friend or fellow bushcrafter. The result is a larger and more efficient stove which can be fed from two sides No need to carry more weight, you stay self-sufficient with your own stove but you can still enjoy the benefits of a larger stove when meeting with others Compatible with all versions of the standard Bushbox and the Bushbox Titanium. Can not be used with Bushbox XL and Bushbox Ultralight! Weight: 19g; Size: 9,2 x 9 cm; Material:Stainless steel.