________________________________________________________________________________ working pressure = 2 lbs (2 psi) to Maximum working pressure = 30 psi The most effective ways of arresting flash back fire is by using sintered porous metal and combined with a spring valve Your safety is well taken care of when you use this HHO torch, and this HHO torch is not available elsewhere. You are buying direct from the designer maker of this hydrogen "HHO" torch with built in fire arrestor I have hand made a small quantity for sale over here This is a patent free technology device, promote Knowledge sharing activities design for mini micro HHO generator Packing list 1) 1 set hho torch hand piece come with 0.35 brass nozzle 2) 1 pc brass nozzle adaptor for stainless steel tip 3) 1pc stainless steel needle tip =0.25 mm, 4) 1pc stainless steel needle tip =0.4 mm, 5) 1pc stainless steel needle tip =0.5 mm, * hho generator output volume 200ml to 1/2 L/min use 0.2 mm needle nozzle, super fine micro flame * hho generator output volume 1/2 to 1 L/min use 0.2 or 0.3 mm needle nozzle * hho generator output volume 1 to 2 L/min use 0.3 mm or .4 needle nozzle * hho generator output volume 3 to 5 L/min use 0.5 mm needle nozzle Note: When using HHO as fire source, You should combine an adjustable pressure on/off switch to your HHO generator. Shipping by post office registered mail, estimate approx. 3 to 5 weeks, If you want fast by courier service, contact me NOTE: Bid only if you agreed with the delivery. ___________________________________________________________________________________________________ ________________________________________________________________________________________________ VIEW MY OTHER ITEMS