Premium High Frequency : Featuring PI+AL composite diaphragm and folding technology, these 74mm tweeters deliver audiophile grade sound with exceptionally clear and detailed high frequency reproduction for true music enthusiasts. Precise 74mm Cut Design : Engineered with exact 74mm aluminum cut panels for seamless compatibility with mainstream loudspeaker enclosures and systems, ensuring easy installation without modifications. Advanced Aluminum Construction : Built with aluminum alloy frames and diaphragms to minimize resonance and distortion, providing uncolored sound with superior rigidity and lightweight . Technology : Utilizing folded diaphragm technology for faster response and outstanding high frequency resolution, natural sound with wide extension. Package includes: 2PCS aluminum panel pneumatic tweeters