EasyPro Redi Tranquil Decor Basin for Fountains and Bubble Features, 23" 11.5" Clearance inside basin with lid on, pump access door 4" x 5.5", 4 -1" holes in lid for tubing Holds up to 300 lbs. With internal support columns 21.75-Inch W x 23.25-inch L x 13.5-inch H Perfect for fountains and bubble features