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 3/4 In.-14, Hex Width 1 3/25 in, Pipe Size 3/4 in, Thread Type NPT, Window Diameter 3/4 in, Maximum Operating Pressure 60 psi, Maximum Operating Temperature 180 Degrees F, Body Material Finish Zinc Plated