The half round gutter outlet, also known as the "B" style outlet, (goose neck / drop) is the fitting used to connect a gutter to a downspout or elbow.
The top of the outlet is curved to match that of a half round gutter to allow for easy installation.
Fits 5", 6", 7", 7.6" and 8" Half Round Gutters.
Specifications
Fits round downspouts
3" outlet is meant to be used with 5" half round gutters
4" outlet is meant to be used with 6" half round gutters
5" outlet is meant to be used with 7" and 7.6" half round gutters
6" outlet is meant to be used with 8" half round gutters