Hollis LG Pony Bottle Gauge - PSI Spearfishing Accessories Lower Volume: TruFit boots have

Lower Volume: TruFit boots have less volume over the instep

Blue and Green

Approach® S3

Anodized finishing and a hardened glass lens to protect your dive light from corrosion

Closure (back zip)

Hollis LG Pony Bottle Gauge - PSI Spearfishing Accessories Lower Volume: TruFit boots haveThe Hollis Pony Bottle Gauge is a tiny gauge that easily connects to the 7 16" high pressure port of your pony bottle regulator or other alternate tank regulator to show pressure in an easy to read display. Any diver who has used a pony bottle knows the hassle involved with trying to find out how much air is in the tank. Switching regulators to view the primary pressure gauge or adding a separate pressure gauge to the pony bottle is a problem