Keep your cat's litter box in tip-top shape with Litter Pan Replacement Doors. This replacement door is specifically designed for the Petmate® Stay Fresh Hooded Litter Pan, size large, and Arm & Hammer's® Hooded Wave Litter Pan, size large. To install, simply insert the right-sided peg into its designated spot on the litter box followed by inserting the left-sided peg. When installed correctly, the door should swing back and forth.