Better than OEM replacement. Additional UV protection molded into the plastic to stop yellowing. Includes pre-applied butyl sealant for both door and window seals. Window held in place by frame and butyl only, use caution when handling the glass. Installation screws not included; use #6 flat head x 1-1/2" length. Glass sold separately. Dimensions: Outside Dim: 15-2/3" x 23-3/4". Window opening: 12" x 21".