The Dive Rite Tech SPG and Depth Gauge Console includes an accurate, oil-filled analog depth gauge with a max-depth indicator, mounted together in a rubber console with a Tech SPG, a { 30 in | 76 cm } high-pressure braided flex hose and swivel spool. The SPG included with the console is { 2 in | 5 cm } diameter with { 1.75 in | 4.5 cm } face and features a chrome-plated all brass housing with a tempered mineral glass face and beryllium copper coiled Bourdon tube mechanism incorporating rack and pinion movement (aka 'pinned') providing the greatest degree of accuracy and reliability. The luminescent dial glows-in-the-dark, making it easier to read in low light situations.