Tank Divider, medium

973 Tank Divider, Medium size. 11 3/8 inch by 9 5/8 inches fits 10 gal aquariums.
974 Tank Divider, Large, 11 3/8 by 11 3/8 inches fits 15 and 20 gal long aquariums
975 Tank Divider, Extra Large, 11 3/8 by 15 1/2 inches fits 20 gal high tanks
976 Tank Divider, Super, 11 3/8 by 17 1/2 inches fits 29, 55 gal tanks