40 1/4" x 25 1/8" x 4 1/2" - SP8833 Shower pan for showers that include a toilet. 2" drain cut out, 1" simulated tile floor, toilet and vent indents.
Sierra Engineering part number: #70.
Shower pan is constructed of durable fiberglass reinforced plastic.
Fits various Coachmen models including: Shasta.
Please verify your measurements and and compare them to the drawing above.