R-Zilla SRZ100011441 Fresh Air Screen Cover with Center Hinge for Pet Cages, 20-3/8 by 10-1/2-Inch, Black Fresh Air Screen Cover With Center Hinge Allows Essential Air Flow In Reptile Terrariums Hinge eases use with lighting hoods Withstands High Temperatures From Heating Devices Measures 20-3/8-Inch Length By 10-1/2-Inch Width By 3/4-Inch Height