Features: Made of stainless steel materials, high temperature resistance, corrosion resistance, not easy to rust, strong and have a long durability and stability. Clear threads, are not easy to slip and can withstand mechanical damage and strong weather influences. These double nipples can serve your water installation or many industrial applications over a long period of time. Suitable for water pipes, hoses, central heating systems, hot and cold water supply, sprinkler systems, vacuum areas, gas media, washing machine water pipes, garden tools and other areas. Provide a stable and enduring connection for various applications of installation technology. Specifications: Materials: Stainless steel Thread type: (1/2inch)/(3/4inch)/1inch 1/2inch diameter: about 20mm/0.79inch 3/4inch diameter: about 25mm/0.98inch 1inch diameter: about 31mm/1.22inch Package Includes: 3Pcs Connector note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.