Uniweld’s RHT8011-1 is a medium / heavy duty two stage acetylene regulator with a machined brass body and chrome plated bonnet. The RHT8011-1 contains two tri-layered reinforced neoprene diaphragms with the first stage at 1-5/8 inches and the second stage at 2 inches. A gold painted steel, single scale, 2 inch diameter, 0-400 PSI Contents Gauge (Part No. G1S) and a 0-30 (Red Line 15-30) PSI Delivery Gauge (Part No. G2S) allow you to monitor pressure flowing through the regulator. The RHT8011-1 has a CGA300 inlet connection, a “B” Left Hand 9/16 inch -18 Male outlet connection, with a delivery pressure of 2-15 PSI. Uniweld two stage regulators are used where steady delivery pressure is required over a range of decreasing cylinder inlet pressure. Delivery pressure will remain constant until inlet pressure is nearly depleted. Made in U.S.A.