Sight Plug Body Material Brass Connection Type Pipe Threads Window Material Glass Seal Material Buna-N Reflector Material Stainless Steel Window Features Fused Window Reflector For Liquid Clarity Clear For Fluid Type Liquid Thread Gender Male Thread Size 1/2 In.-14 Hex Width 22/25 in Pipe Size 1/2 in Thread Type NPT Window Diameter 14/25 in Maximum Operating Pressure 100 psi Maximum Operating Temperature 180 Degrees F Body Material Finish Zinc Plated