E0042: Stainless Steel 1-2/3" Newel Post w/Floor Mount / 39-3/8"H (Interior - Grade 304)

E0042-316: Stainless Steel 1-2/3" Newel Post w/Floor Mount / 39-3/8"H (Exterior - Grade 316)

E0040: Stainless Steel 1-2/3" Newel Post w/Floor Mount/ 47-1/4"H (Interior - Grade 304) 

E0040-316: Stainless Steel 1-2/3" Newel Post w/Floor Mount / 47-1/4"H (Exterior - Grade 316)

The base has a diameter of 3-15/16".

INNER DIAMETER: 1-1/2"