Port outside corner piece for 1" inside corner radius adapter stud size is 5/16"-18( for

stud size is 5/16"-18( for 6 and 8 sub plates check our other listing

These will save you from using flimsy all-thread and not having to drill out the mounting holes on those $2000+ amps

3 and 4 amp models

These can be adjusted from 90 degrees to 45 degrees in 11 degree increments( 5 positions)

Port outside corner piece for 1" inside corner radius adapter stud size is 5/16"-18( forOutside corner piece for 1" inside corner radius, these corner pieces have a 1" radius to match the radius of our rectangle and square port flares, fastened with flathead screws that are included, sold individually. (these do not include the straight pieces, only the corner piece) MADE IN THE U. S. A.