Enjoy digital accuracy on a modest budget: Watch the kiln temperature on the hand-held, easy-to-read digital pyrometer, which is included at no extra charge. The pyrometer will help you determine the cooling rate of difficult glazes or know when to begin monitoring glass. It takes the guesswork out of firing. The reliable hand-held pyrometer weighs only 5 ounces and measures in degrees F up to 1999F. (Please note: If you fire hotter than 1999 F, you will need a pyrometer that reads higher temperatures.) The liquid crystal display is easy to read even in bright daylight. Replace the Type-K thermocouple in seconds with a simple plug-in connection. The Paragon FireFly is made of durable 2 1/2" thick insulating firebrick, which stores heat for slow cooling and safe annealing of smaller glass projects. The solid 2 1/2" thick firebrick top and bottom help seal in the heat. To strengthen the firing chamber, the firebrick corners are fitted together with L-shaped notches. This type of joint lasts longer than the butted joint and the "picture frame" mitered joint found on competitive brands. Dropped, recessed grooves protect the replaceable heating elements for longer life. Wires are fastened to the elements with heat-dissipating connectors refined and proven over many years in Paragon kilns. Rugged construction makes this kiln a little workhorse. This kiln is built to last. Elements are coiled from the finest high-temperature wire available. They use heat-dissipating element connectors refined and proven over many years in Paragon kilns. The hinged lid is self-adjusting to compensate for expansion at high temperatures. The hinge includes a stop that holds the lid open and out of the way. Lift the lid with a handle on the front or a separate handle on the side. A built-in 3" tall steel base with mar-proof rubber feet covers the entire firebrick bottom. Place the kiln directly onto a heat-resistant work surface. No extra stand is needed.