These brackets are 100% equivalent to the following manufacturers:

• 80/20  #4336-BLACK
• T-SLOTS / Futura #654169
• McMaster #47065T798

The dimensions are 1.313″ x 3″ x 3″, and have a wall thickness of .250″ (1/4″).  The holes are Ø0.328″, 1.5″ between centers.

• Made of 6105-T5 Aluminum and have a black anodize finish
• They will fit 15 Series or 8mm T-Slotted Extrusions