Pond H2o Instant Cascading Waterfall Spillway is made from heavy duty polyethylene. Easily create pond waterfalls with this garden water feature stream rock pool watercourse. The waterfall is a preform made of two pools. Designed to be used in gardens and ponds. Molded spill way that is aquatic habitat safe. Natural black stone-look waterfall is intended to blend naturally in your aquascape, that can be easily camouflaged. Lightweight design for easy installation. The polyethylene material is durable and ensures that the pond is robust and long lasting. Weather, UV and frost resistant. Perfect addition to any water garden Koi fish pond and garden. Can be mixed and matched with PondH2os other Cascading pieces to make unique waterfalls.