Features: These terminals are made of corrosion-resistant copper to prevent air oxidation, which can provide your audio component with perfect and stable signal and sound quality. Screw Locking Speaker Wire Connector, Rear entry diameter: Approx.4mm/0.16in. Type: Double screws locking. Applicable for speaker cables up to 4.0mm. Specifications: Material:Copper/Rhodium Plated Size:Approx.42x13mm/1.65x0.51in Rear entry diameter: Approx.4mm/0.16in Option Type:Copper Plated Spade Connector,Rhodium Plated Spade Connector; Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 4x Speaker Spade Connectors