PEPPERLONELY Brand 300 PC Antique Copper Copper Wire Protectors 1/8 x 1/8 Inch ( 4MM x 4MM ) Quantity: 300 PC Size: 1/8 x 1/8 Inch ( 4MM x 4MM ) Hole Size: 0.5MM Thinkness: 1.3MM Material: Copper(Lead and Nickel Safe)