15 Series 1.5″ x 4.5″ SMOOTH Heavy T-Slotted Aluminum Extrusion.

SPECIFICATIONS:
Weight = 3.74 lbs/ft (5.566 kg/m)
Estimated Area = 3.113 in2 (20.084 cm2)
Moment of Inertia = Ix=0.739 in4 (30.760 cm4)
Iy=5.913 in4 (246.118 cm4)

These extrusions are 100% compatible with the following manufacturers:

• 80/20 #1545-S
• T-SLOTS #650010
• FRAME-WORLD #EX-26
• McMaster #47065T521

Extrusions have a clear anodized finish, and may have one end anodized as well.
They are in the “15 Series”, and have a slot opening of approx. 5/16″.