Fit this gas mask flavour pump set to your gas mask that has a standard 40 mm connection. Enjoy your favourite aroma at any time by pressing the plunger, which pushes the aroma through the tube into your gas mask. The glass flavour bottle and rubber hose are resistant to the corrosive effects of flavours. This is a great breath control game that gets even better when combined with bondage. Rubber gimps and drones will love it! Provides exactly the dosage you want - only releases the flavour when you pump / Mounts to a standard M40 gas mask hose