Preventative Maintenance Kit for Model 7304-22 (22 cu. ft. Arabidopsis Chamber) Includes (1) FIL-114 Filter Media, 25 PPI, with Reinforced Backing, (4) VEL-104 1/2" Velcro Discs, and (18) LGT-156 Lamps, Fluorescent, 24 Watts. Detailed Instructions Included.