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 yoke or DIN with bleeder device. Complete with hose, two yoke or DIN fittings, and integrated bleeder unit, this equalizer is manufactured from marine grade chrome plated brass and durable high-pressure hose, Yoke version has large impact resistant yoke screws that are even easy to handle with gloved hands. The connector is a rated for 3,200 psi (220 bar) on the yoke version and 4,500 psi (300 bars) rated on the DIN version. Cross-Over Equalizer is rated for air only.