the externally braced turbines have three braces that surround the outside of the turbine
Carbon Steel
protects against scuff marks
Cotton Head & 3 Bands To Eliminate Tangles
Tough thermoplastic construction
900 Series Commercial Door Closer, Aluminum Finish, Adjustable Size 1-6 Shower Floor & Base the externally braced turbines have900 series, 12916 commercial grade 1 door closer with cover, 2 million cycles, adjustable size 1 6, fits doors from 2' to 5' width, aluminum finish, ul listed 3 hour fire rated, ada compliant, retrofit hole pattern 5" horizontal x 2 1 4" vertical measurements, tri packed for regular, top jamb & parallel arm applications, adjustable spring tension, sweep & latch valves.