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 1/4 In.-11 1/2 Hex Width 1 3/4 in Pipe Size 1 1/4 in Thread Type NPT Window Diameter 1 19/100 in Maximum Operating Pressure 25 psi Maximum Operating Temperature 180 Degrees F Body Material Finish Zinc Plated