Live Well Aerator/Bait Bucket Replacement Air Stone/Air Diffuser/Bubble Stone, manufactured by BubbleMac Industries, Inc. - Provide an oxygen enriched environment for your baitfish. This air diffuser is a high quality ceramic airstone. {This IS NOT a Discard-A-Stone.} Durable, low maintenance and lasts a long time. Standard 5/32" Air Line Connection. Promotes Lively More Active Baitfish. "Ya'll Got Bubbles"? Self-Weighted and Non-Clogging. - SPECS: 100% Glass-Bonded Silica, Maximum Pore Size 140 Microns, Nominal Partical Retention 50 Microns, Flexural Strength 2500 PSI, Bubble Size 1-3 MM, UNLIMITED LIFETIME When Used in pH of 8.0 or Less!