Thickened Material : This downspout extender is made of PE material, we thicken them to make it more harder and sturdier than others. We've done thousands of load-bearing tests, and it can withstand at least 10 pounds without deformation. It is suitable for the complex environment outside your house. You can even bury it in the ground Upgrade Design : Each downspout drain extension comes with 2 different sizes of "adapters" to be suitable for 2 x 3 inches, 3 x 3 inches, 3 x 4 inches and 3.5 x 4 inches downspout. Its split design allows you to use them more flexibility in different scenes Widely Used : This downspout extender EACH downspout extension can easily be extended from 21 to 68 Inches. So it will help you protect the foundation of the house from damage, irrigating garden and so on Excellent Performances : It has excellent performances of flexibility, easy to bend, and easy to restore to its original shape with no creases or cracks.