Features and specifications: 1) The body is made from quality brass or Zinc by hot forging 2) Chrome plated 3) Minimum oPen-close time can reach 12,000 times 4) Each valve be tested by compression air 5) Dimensions: 1/2" x 1/2", 1/2" x 3/4", 3/4" x 3/4" 6) Applications: water, gas, oil