4208BC, 14 x 116 x 72, Aluminum, Mill Channel, Designed For Trim Work, Frame Work Reinforcement Projects, Often Used To Fit A Plywood Edge Where The Plywood Thickness Matches The Channel Width Dimension, Channel Width Dimension Is The First Size Specification Listed In The Size Column, Is A Fraction, Aluminum Is Light Weight, Yet Strong, Withstanding Heavy Pressure Loads, Aluminum Can Be Bent Or Formed Into A Multitude Of Shapes