Features: 5090 Speakers diaphragm with mounting holes, square bass diaphragm, passive plate rubber vibration membrane. Quality rubber material ensures durability and long time use. Use this rectangular speakers diaphragm to immersive yourself in a captivating sound experience. Specially designing for music enthusiasts and professionals, essential accessory. Perfect for home theaters and parties, this diaphragm enhances bass response and provides clear sound. Specifications: Material: Rubber Color: black Size: about 5x9cm/3.54x1.97inch Quantity: 2pcs/set Package Includes: 2Pcs 5090 Vibration Membrane with Mounting Holes note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.