Preventative Maintenance Kit for Model 6034 (33 cu. ft. CO2 Incubator) Includes (1) FIL-114 Filter Media, 25 PPI, with Reinforced Backing, (1) FIL-213 Filter, .2 Micron, (1) NOZ-110 Atomizer, Brass with Mesh Screen and (4) VEL-104 1/2" Velcro Discs. Detailed Instructions Included.