Harris 701-050-326-D - 701050326D - Nitrous Oxide Regulator LA-56 The pre-filter mats should be

The pre-filter mats should be replaced about once a month if welding approximately 40 hours a week

This heavy-duty #12HD cup is specifically engineered for

Harris Two Stage Ultra High Purity Brass Barstock Regulator Model 721-125-580-DR - 721125580DR

Keep them dry in normal storage

Harris 701-050-326-D - 701050326D - Nitrous Oxide Regulator LA-56 The pre-filter mats should beHarris High Purity Regulator Model 701 050 326 D 701050326D Model HP701 is a chrome plated brass Single Stage Cylinder Regulator with a Stainless Steel diaphragm for general laboratory use. The HP701 can be used when a slight pressure rise from full to empty Cylinder can be tolerated. This model is available with various delivery pressures, CGA inlet fittings, accessories and other options for a customized Regulator to meet specific requirements.