Order # 37893900 Manufacturer# 32630 Brand McKesson Manufacturer McKesson Brand Application Dry Humidifier Reservoir Contents Empty Reservoir Volume 400 mL Resistance 6 PSI UNSPSC Code 42271801 McKesson Dry Humidifier 6 psi pressure. It has up to 400ML capacity and accepts standard oxygen tubing. This product is latex-free, single patient use.