Standard 120-10 System

(Nominal 1/2” x 1/2” Frame)

Standard 120-18 System

(Nominal 3/4” x 3/4” Frame)

Standard 130-25 System

(Nominal 1” x 1” Frame)

Standard 140-25 System

(Nominal 1 1/2” x 1” Frame)

Standard 150-25 System

(Nominal 2” x 1” Frame)

Standard 150-45 System

(Nominal 2” x 1 3/4” Frame)

Standard 170-50 System

(Nominal 2 3/4” x 2” Frame)