Updated Dial Gauge design introduced in 2019! 30% Bigger, easier to read face Easier to read Neon Yellow indicator Shows pressure in both PSI & BAR Gauge will always display in correct orientation (no longer random threaded) Made in USA Upgrade your Spare Air or HEED (series 175 & 300): Takes place of the existing Pin Style pressure indicator. Easy to install - no special tools required! Simply unscrew the Pin Style pressure indicator from your Regulator, screw in the Dial Gauge and you're ready to go! Please Note – other pony dial gauge pressure indicators available will not work on the Spare Air. The only authorized Dial Gauge guaranteed to work on Spare Air/HEED is this model available by us or our dealers. Works with Spare Air Xtreme 6. Not compatible with EasyDive or HEED 200 series - see alternate listing.