Ozone Diffuser Replacement - Twin-Pack - Manufactured by Bubblemac Industries, Inc. Makers of The Forever Bubble Stone Model #1112FK-2 These specialized Oxone Diffusers are designed to replace the cheap import diffusers that come stock with most Ozone Generator Units. Bubblemac Replacement Diffusers will provide "Efficient Delivery" of Ozone in the following manufacturers units: {A2Z - Aqua6, MP3000, MP5000, MP8000}; {Signstek - 400mg/h and 500mg/h}: {O3 - Fruit and Vege Washer}: {ENALY - OZX-300AT, OZAC - Plus- 200mg/h, 500mg/h and ZO-30N}: As Well As Other Models Not Listed! Bubblemac Ozone / Pure Oxygen Diffusers are constructed of high-quality 100% glass-bonded silica and come complete with KYNAR 5/32" air line connection fittings. {Kynar is compatible with corrosive gases} -- {TWIN-PACK} These diffusers are time-tested and have proven outstanding performance in hatcheries and labs worldwide for the past 30 years. -- Replace your ozone diffuser with a diffuser that is actually designed to handle the strongest concentrations of ozone, and guaranteed to do so time and time again. These diffusers measure .75" x .75" X 1.5". BUBBLEMAC manufactures Oxygen / Ozone Diffusers in many different sizes with a selection of fittings {Stainless Steel, CPVC, Kynar} ALL of which are compatible with corrosive compressed gases. See the pictures for examples.