Phoenix Contact, C-RCI 2.5/M3.5 Insulated Ring Terminal, M3.5 Stud Size, 1.5mm² to 2.5mm² Wire Size, Blue, Insulation Material: Plastic, Inner Ring Diameter: 3.7mm, Outer Ring Diameter: 6.6mm, Contact Material: Copper, Thickness: 0.8mm, Overall Length: 20.6mm, MPN: 3240022