Frabill Aeration Stones Replacement Yellow. Keep your portable aerator operating at peak efficiency by replacing the air stone on a regular basis. Specifications for Frabill Replacement Aeration Stones: Manufacturer: Frabill Color: Black General Application: Fishing Quantity: 1 Features of Frabill Replacement Aeration Stones High Output Air Stones quality aeration Premium Air Hose- includes 30 of tough non-kink air hose Includes aerator hose & 2 stones 7" x 5.5" x 1.5" Package Contents: Frabill Replacement Aeration Stones Frabill PMC14281: Aeration Stones Replacement Yellow