Description:Features: . It is a voice coil for professional audio tweeters.44.4 44.5 core treble titanium film. Lightweight and portable. As an accessory for tweeters. Specifications:Item Type: 44.4mm Height Voice Coil 44.5mmImpedance: 8Omega; Power: 50-120 W Coil Material: Copper Coated Aluminum Diaphragm Vibration Material: Imported Titanium Diaphragm Color: Silver Szie: (Approx.) Cylindrical Diagonal: 9.8cm / 3.86 in Back Diagonal Line: 10.8cm / 4.25 in Outer Circle Diameter: 7.2cm / 2.83 in Inner Circle Diameter: 4.5cm / 1.77 in Quantity: 1 pc (other demo accessories in the picture are not included)Note:1. Transition: 1cm=10mm=0.39 inch2. Please allow 0-1cm error due to manual measurement. Pls make sure you don't mind before you bid.3. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes: (Non-Retail)1 X 44.4mm High Resolution 44.5mm Voice Coil