OpalMist U-Series Nebulizer 0.2mL/min, includes UniFit Connector with 0.50mm ID x 1.6mm OD x 700mm long tubing (1 pc) & EzyLok Connector (1 pc).Optimum nebulizer gas flow rate is 1.0L/min & sample flow rate is 0.2mL/min. Recommended not to exceed optimum 0.2mL/min sample flow rate; however, lower gas & sample flow rates are OK. The backpressure should read ~40 psi at 1.0L/min gas flow rate. OpalMist is made from high purity PFA resulting in the lowest background & exceptional resistance to HF. Tolerates up to 15% TDS & 75um particulates.Replacement parts include P/Ns 502702959, 502702994 & 501907289.Recommended nebulizer maintenance tools, Fluka RBS25 (P/N NC9000117) & Eluo Nebulizer Cleaning Tool (P/N 501907353). When nebulizer is not in use, store in the provided hard plastic case.Consider upgrading to our new Direct Connect (DC) OpalMist to take advantage of the cost-effective design improvements.Glass Expansion is ISO 9001:2015 certified by AB Certification, No. AU4501-9001