this is the hho generator jar on my 1991 ford f150 with a 5.0L V8. i made it out of a 1 quart glass mayonaisse jar with a plastic cap. it has two 6 inch stainless steel bolts bolted to the cap, wired up to a fuse box under the hood, and is wired to a 30 Amp switch under the dash that i use to turn it on/off. it makes plenty of hydrogen and oxygen which is plumbed into the manifold vacumm on the intake. its supposed to up the mpg a little bit, but only time will tell, i havent gotten that far yet. any questions or comments are welcome, thanks for watching.