The Rion Greenhouse Rain Gutter 4 ft. extension is designed to extend your greenhouse gutter in 4 ft. Lengths. You will need to purchase one (1 ) extension kit for every 4ft. length you wish to add rain gutter to. For example if you have a Rion Professional GH48 16 ft. long greenhouse, you would need 1 gutter kit, plus 2 gutter extensions.

The Rion Greenhouse Rain Gutter 4 ft. extension is designed to extend your greenhouse gutter in 4 ft. Lengths. You will need to purchase one (1 ) extension kit for every 4ft. length you wish to add rain gutter to. For example if you have a Rion Professional GH48 16 ft. long greenhouse, you would need 1 gutter kit, plus 2 gutter extensions.