Manufacturer plusgutter. 【 US Patented Product 】: No.D988482, No.D988483, No.D997309, No.D1009230, No.D1012250, No.D1016252, No.11885441,【 Thickened Material 】: This downspout extender is made of PE material, we thicken them to make it more harder and sturdier than others.