Daughtridge Sales Co., Inc. specializes in gauge cocks, thermometers and related items. Gauge cocks are an economical way to shut off air lines. Each unit is tested at 80 psig air. The maximum temperature of our gauge cocks is 500°F. They have a spring bottom with 5/32 in. port standard. We also have nut bottom units available for pressures up to 200 psig with 1/8 in. port. Due to large number of products in our inventory, we are unable to include pricing on our website. If you have specific requirements, 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 gauge cocks feel free to call us at 1-800-967-7507.