2 New Modkat XL Litter Box liners type C still in original bag. These are for top entry. My cats don’t like top entry litter boxes so these are no use to me. Type-C liner refills for the Modkat XL top-entry configuration Constructed of rip-resistant tarpaulin Easy to empty and clean Perfect fit to remain out of sight One liner lasts up to 3 months! 20 x 16 x 15H in. (50.5 x 40.5 x 38H cm) A clean litter box makes for a healthy and happy cat. We recommend replacing Modkat Reusable Liners when there are signs of fraying, or after 3 months time to keep bacteria and odor in check. The integrity of the liners depends on how many cats use the litter box, how much litter is used, and how ferociously they scratch. Daily scooping and sustaining the litter level at 2-3 inches (5-7.5 cm) will maximize their life.