12521 Features: -Stone. -Plastic air diffusers. -Excellent aeration device for use in under gravel filters, corner filters, or just decoration. -6 Pack. Product Type: -Air Stones & Diffusers. Pet Category: -Fish and Aquatic Pets. Generic Dimensions: -6.75'' H x 1.25'' W x 3.25'' D. Dimensions: Overall Height - Top to Bottom: -6.75 Inches. Overall Width - Side to Side: -1.25 Inches. Overall Depth - Front to Back: -3.25 Inches. Overall Product Weight: -0.1 Pounds.
Discard-A-Stone Fine Diffuser (6 Pack) [Set of 3] - B00SLAKR6I