Durable insulated liner is removablenAccessory lidnIncludes a 1423 Frabill aeratorn4.25 Gallon capacitynFrabill ice 14071 aerated bucket 4.25 Gal. (Replaces 1407). Durable insulation-from hard shell molded outer bucket and insulated foam liner. Accessory lid- molded in notches for accessories such as minnow dip nets and aerators. Comes equipped with a 1423 Frabill aerator for whisper quiet aeration that runs ultra quiet.