Description:brand new and high quality Features: This is a radiator for DIY Bluetooth-compatible speakers to enhance the effect. Premium material ensures maximum strength and durability for long lasting usage. Suitable for 2-5inch speakers. Bass Diaphragm only, other accessories demo in the picture are not included Specification: Material: Metal+Rubber Color: Black Diameter: 78mm/ 3.07in Thickness: 7mm/ 0.28in Mount Hole: 77mm/ 3.03in Hole Distance: 60x60mm/ 2.36x2.36in Diagonal diameter: 84mm/ 3.31in Quantity: 1 Set Note: 1.No retail package. 2.Please allow 0-1cm error due to manual measurement. plz make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 2 Pcs x Bass Diaphragm