Check the listing for details. Ai 20L HeatedShield 400C Fabric Heating Top with Temperature Controller. Condition: New. Listed at 700.00 USD. The Ai ultra-thick 400°C heating tops will keep your distillation setup at the peak of its performance, they will help prevent vapor condensation in the upper half of a flask, at the same time, protect the flask, the solutions, and the lab from drafts, which would disturb the reflux ration during fractionation, from flying glass of flask implosions in high vacuum distillations, from falling objects; and from thermal strain between top and lower half of flask during high-temp operations.Inner fabric color may change due to pre-treatment before shipment, which ensures that no smoke or odors (caused by heat) are released into your work environment. Features110V 60Hz, 400 watts. 400°C max.Control your heating top temperature with the new Ai quick controllerInner beige color fabric: rated for 1000­°C constant temperature, contains 96%+ SiO2Fiber glass insulation: rated for 800°COuter light grey fabric: rated for 280°CAll non-electric conductive materialsVery low thermal conductivity for the best insulation effectAccommodates 1, 2 or 3-neck 20L flasksSuper easy installation and removal with Velcro strapsThickness: 2 inchesUnit: 18 x 18 x 8.5" / 8 Lbs, shipping: 13 x 13 x 13" / 7 Lbs