The Precision Medical Hex Block Assembly is available oxygen, medical air, and medical vacuum. The Hex Block is made from black anodized high quality lightweight aluminum. The Hex Block consists of one (1) inlet and three (3) outlets are NPT Females. The Hex Block Assembly outlets come standard with DISS Male Demand Check Valve to 1/4” NPT Male. The Hex Block Assembly can be sold individually or attach any fitting on the inlet and complete the full assembly.