Great set for the handyman.  This will work on R12/R22/502 systems.  This manifold will need additional items purchased if you wish to use it for R134a systems.
Gauge set includes:
60" hoses set
sight glass with moisture indicator
Gauge set features:
zeroing adjustment screw
gauge pads
1/4" ends
anti-flutter
hoses are compatible with R12, R22, R134a, and hydrocarbons
To make this EPA approved, purchase #3368 Inline hoses
If charging using small cans, please purchase the Blue Top Can Tap #5005. This can be found under the Tools section.