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 2 In.-11 1/2 Hex Width 2 1/2 in Pipe Size 2 in Thread Type NPT Window Diameter 1 22/25 in Maximum Operating Pressure 10 psi Maximum Operating Temperature 180 Degrees F Body Material Finish Zinc Plated