Apeks TEK Gauge SPG with hose, Metric (BAR)The Apeks TEK gauge (BAR) is a high quality chrome plated Submersible Pressure Gauge (SPG) with a black face to help reduce glare and to preserve night vision in low light environments. 23. 5 (65cm) hose. Features: High quality chrome plated SPG Black faced SPG with luminescent numbers and hand that glows in the dark when charged with a light The black face helps reduce glare and preserve night vision in low light environments i. e. inside a cave or