Daughtridge Sales Co., Inc. specializes in needle valves, pressure gauges, thermometers and related items. Our needle valves are made out of brass and each has a size of ¼ inch NPT. Our needle valves also have an orifice of .152. They all have a pressure rating of 600 PSI Max and have Teflon packing. Due to large number of products in our inventory, we are unable to include pricing on our website at this time. If you have any specific requirements regarding our products, please contact us and we will provide you with pricing and availability. If you have any comments or questions concerning our products or services including our needle valves feel free to call us at 1-800-967-7507.