Usage Tips:2pcs/set Foam Ring Rubber Speaker Loudspeaker Speaker Surro Repair d and Features: Made of rubber material, high elasticity, flexible, and not easy to break. This rubber edge is anti-aging, moderate softness and hardness. Six size optional, it is suitable for 4/5/6.5/8/10/12 inch speakers. To replace the old, broken or damaged one. Easy and simple to use and operate. Repair Foam Woofer Edge only, other accessories demo in the picture is not included Specifications: Item Type: Repair Foam Woofer Edge Material: Rubber Size: Outer Diameter: 4": 98mm/3.8in, 5": 127mm/5in, 6.5": 156mm/6.1in, 8": 195mm/7.6in, 10": 248mm/9.7in, 12": 295mm/11.6in(Optional) Color: Black Quantity: 2 PCS Methods of replacing: Remove the gasket and rub off old foam, apply contact cement(not included). Center the surro evenly as you place it on cone. Squeeze the inside of surro to cone with thumb on top and index finger up inside the frame, erneath the surro and go aro a few times until it adheres. Apply elmers wood glue to outer frame, press down surro. Re-glue gasket to outer surro. Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Includes: 2 x Repair Foam Woofer Edge