Window Sight Flow Indicator with Impeller Indicator Type Rotor Body Material 316 Stainless Steel Connection Size 1 1/2 in Connection Type FNPT Operating Pressure - Maximum 125 psig Sight Material Tempered Glass Sight Diameter 2.9 in Number of Windows 2 Flow Direction Horizontal Left Horizontal Right Vertical Down Vertical Up Media Temperature - Minimum 32 Degrees F Media Temperature -Maximum 200 Degrees F Seal Material Buna-N