Our Fogg Flavors TerpTopper terpene infusion system has a built in hydrometer and clips for two humidifying disks. Tops a normal-mouth mason jar and allows you to monitor the humidity of your material. Comes with humidifying disks and 30ml of Fogg Kure. Simply fill the disks with Fogg Kure, clip them in and screw the cap onto any normal-mouth mason jar. This system will keep your material at the optimum RH while infusing it with terpenes.