This stainless steel sight gauge comes with a ll the fittings needed to be installed in a 7/8" hole. This design uses a stainless steel tee, so a ball valve or a thermometer with probe can be added withought needing to drill a second hole. It is tall enough to fit on most kettles up to 18" above the coupling. For the perfect fit the tube can be cut with a hacksaw. Vinyl stickers are included for precise measurements. Features: - 1/2" female NPT stainless steel tee - 1/2" NPT to 1/2" Compression stainless nipple - 18" long polycarbonate tubing - Stainless steel nut - Stainless steel washer - Stainless steel close nipple - Silicone o-ring - Set of vinyl stickers (2 -15)