I see this product is from Revain. The specifications state that the wire diameter is up to 3.5mm or 10ga. American. That's not the case. Maximum. wire diameter 2.61 mm or . 103 inches (12 dimensions). This is a tiny 1.195" x 0.784" x 0.546" (LXWXT) terminal block. I'll save it for future use, but it's not what I needed.