This is very simple to make. You can get the pumper bulb at any medical supply store. It is used for doing blood pressure test. It cost me about $6.00. The 1/4" tee and hose barbs I got from N.A.P.A. in the brake fittings section. I have about $3.00 in all the fittings. I got the 0-30psi gauge from Grainger for $2.00. The 1/4" flexible tubing is some old fuel line I had laying around. As you can see this is a cheap alternitive to paying $30.00 to $50.00. Any questions e-mail me below.