This item is currently out of stock.
ICON's HT165BED is a direct-fit replacement for RVs with a center-end-drain holding tank in this 32" x 32" x 7" footprint. The 3" spigot fitting and four level sensors come preinstalled, so the swap is mostly reconnecting existing lines and wiring.
Verify your existing tank's footprint and drain position against these specs before ordering, since low-profile holding tanks vary by RV make and floorplan.