【Parameter】- Outside Diameter: 295mm/11.51"; Convex Outside Diameter: 265mm/10.34"; Convex Inside Diameter:235mm/9.17";Inside Diameter:215mm/8.39"; | 【Superior Material】- The 12 inch speaker rings is is made of high quality rubber;pliable;anti-aging and durable;same surround that professional reconers use; | 【Wide Range Use】-This Rubber Surround is ideal for speakers repair or DIY;Suitable for winding various audio frequency divider inductors,small transformers,electronic and electrical products,etc; | 【Easy to Install】-The Rubber Speaker Rings are easy to follow step-by-step installation instructions,free technical support,easy to install; | 【Package Contents】- The package contains 4PCS Perforated Speaker

[Size]-75mmx33mmx76mm(DiaxInner DiaxOuter Dia);Number of LED:36;Angle Degree:15;Color: White | [15 Degree Wide Angle]-The Round Plate Illuminator real wide angle IR flood,no light spot,better light up your camera's viewing range,and provide you good night vision image,best match your wide angle security cameras | [Even Illumination]-This IR Infrared Illuminator Board has wide voltage and constant current design, high efficiency, high power factor, stable circuit structure | [Suitable For]-Replacement for your broken or worn out LED board, suitable for CCTV security cameras | [Note]- Please see the light board size clearly before Replace the CCTV camera light boar;For outoor applications, please make sure that is protected by a weatherproof box and the DC connection is sealed with electrical tape

【Parameter】- Outer Frame Diameter: 95mm/3 inches; Inner Mesh Diameter: 72mm/2.83 inches; Diagonal Center Hole Distance: 84mm/3.3 inches; | 【Superior Material】- Inner Mesh: Cold Rolled Steel; Outer Frame: ABS Plastic; | 【Easy to Install】- This mesh speaker grill has four screw holes, makes it a ready-to-go audio accessory; | 【Bundle】- Distribute screws, make you more convenient installation; | 【Wide Range Use】- Suitable for bookshelf speakers, subwoofers, tweeter, computer speakers, in-ceiling or in-wall speakers.