This is the XS Scuba Deluxe Cylinder Equalizer with Braided HP Hose Features: Great for equalizing cylinders for maximum air availability Easy to read 2 inch diameter gauge Dual dial - 0 to 5000 psi and 0 to 350 bar Liquid silicone filled for dampening Air bubble to allow for expansion with tempreture change Quick action bleed screw Two spin on yoke adapters Attachment to K and all style DIN vavles Ever been out diving with friends and the conditions are fantastic, yet you can't get back in the water because there are not two tanks available with enough air for a buddy team to get any descent bottom time? You got one full tank and another just under half full. If only you could equalize the two cylinders so you have two tanks 3/4 full! Equalize pressure between two scuba tanks with this 34' (86.36cm) long dual yoking with bleeders device. Complete with hose, two yokes, in-line gauge for monitoring pressure and integrated bleeder unit, this equalizer is manufactured from marine grade chrome plated brass and durable high pressure hose, has large impact resistant yoke knobs that are even easy to handle with gloved hands. The pressure gauges have readouts of 0 to 5,000psi (0 to 350 bars). The gauge faces provide both imperial (outer readings) and metric (inner reading) for quick and easy pressure checking. The connector hose is a high pressure 5,000 psi (350 bars) rated working pressure hose.