Northeast Products Therm-A-SEAT Infusion Bucket Lid Spin Seat The thickest, most comfortable bucket lid you can buy! The 3 inch thick Flat-top design is super comfortable Fits onto ANY standard 5-gallon bucket; STANDARD 12&quot; DIAMETER Features our Infusion triple-layer foam and is totally waterproof; Perfect for Ice Fishing and Duck Hunting Straps for easy detaching, easy cleaning