3 things are needed for A great expansion. 1. good pump equipment;2.Heat (hot water in a bath tub is best, buy if not available, then use a heating pad;3. poppers.... get a really good pump going.. take to the edge where it almost hurts, then take a hit of poppers and you'll feel like your dick will blow out the end of the tube. UNLIKE ANYTHING ELSE, MAN! Then when it relaxes a bit(not much) then pump it again and take to the edge, take a hit, and then pumps me more your dick be beyond huge.
3inch tube I believe by 18 inches long with the red handles and Brass cylinder and pressure gage . I have had it up to 400 PSI.for 30 min. s at a time the gage only goes up to 700 psi. 400 is freeking tight .