Aquascape Twin-Tier Spillway Bowl Set is a Aquascape-branded product in the ownkoi catalog. Two-bowl matched spillway set: a 20-inch upper bowl overflows into a 16-inch lower bowl, then into the pond. Cast-resin construction with matched stands. Specifications and pricing reflect the manufacturer-published or retailer-published data at the most recent catalog refresh. Verify the live listing on the source retailer page before purchase.