Dekorra Artificial Rock Backflow Cover - Model 110 - Choose OptionThe Fake Rock Artificial Stone Backflow and Water Pump Cover 110 is specially designed to conceal backflow assemblies and external water pumps, ensuring your yard has a seamless look. This landscaping rock adds a decorative element to the garden, while easily slipping over unsightly plumbing. This faux stone is made of durable polyethylene that is UV protected so it won't fade in the sun or crack in cold weather. This sturdy artificial stone is resistant to line trimmers and impact. Made of recycled materials, this faux stone is also environmentally friendly. ble Interior Space (max dimensions) At 2" High: 36"L x 16"W x 18"Diameter At 4" High: 35"L x 16"W x 18"Diameter At 6" High: 34"L x 15"W x 17. 5"Diameter At 8" High: 34"L x 13"W x 16"Diameter At 10" High: 33"L x 12"W x 14"Diameter At 12" High: 32"L x 11"W x 12"Diameter At 14" High: 31"L x 10"W x 11"Diameter At 16" High: 31"L x 9"W x 9"Diameter At 18" High: 30"L x 4"W x 8"Diameter 28"L x 6"W x 8"Diameter At 20" High: 28"L x 2"W x 6"Diameter Assembly level/degree of difficulty: No Assembly Required.