Replacement Air Diffusers / Air Stones - Marine Metal, Frabill, Tournament Choice, Bass Pro, South Bend - Bait Bucket Aerator / Live Well -"REPLACEMENT AIR DIFFUSERS" - {twin pack; model# RD1111} MADE LOCALLY / USED GLOBALLY -- Bubblemac Air Diffusers have been considered the "Standard Of The Industry" in fish farms, hatcheries and college labs worldwide for 30 years. NOW AVAILABLE in a design specifically built to "Replace" the cheap import diffusers that come stock with many popular manufacturers Bait Bucket / Live Well application, aeration products. "AN EXCELLENT CHRISTMAS GIFT IDEA FOR THE FISHING ENTHUSIAST IN YOUR LIFE" -- These air diffusers measure .5" x .5" x 1.5" with a 5/32" barbed fitting that will plug right into your existing air line. Self-Weighted Design. Made In The USA If you are tired of replacing the air stones that came with your bait bucket; REPLACE them with a Bubblemac Aeration Product and rest assured of the premium performance you will recieve. Replaces the diffusers on the following manufacturers and models -- MARINE METAL PRODUCTS {Bubble Box, Quiet Bubbles, Cool Bubbles, Air Bubbles, Power Bubbles and Baby Bubbles}; FRABILL {Min-O2-Life, Aqua Life Premium, Cooler Aerator, Quiet Aerator, and Portable Aerator}; TOURNAMENT CHOICE {Aerator and Dual Aerator}; BASS PRO AERATOR, SOUTH BEND BAIT AERATOR and other less popular models not listed. Each air diffuser will support approx. one pound of active minnows.