Product review (3 stars): I wouldn't order this one if I were you!
First of all, they shipped it in the manufacturer's flimsy box.  The mailing label partially blocked the instructions.  Thanks Amazon Prime!!!
The enclosed zip ties  to secure the ductwork to the dryer and lint trap were useless .  One wouldn't fasten at all.  I filled the trap to the correct water level but water splashes out and wets the floor.  I guess you get what you pay for and I chose the cheapest one.