Features:Upgraded Ceramic Tube Socket is Perfect for DIY Audio ProjectsMade of Durable ABS Material, ensuring long-lasting durability and performance.Suitable for Audio Enthusiasts, Hobbyists, and DIYers.5PCS B9A Ceramic 9Pin PCB Tube Socket; It is for 6DJ8 EL84 6922 6BM8 6BQ5/EL84 6CG7/6FQ7 6DJ8/ECC88 6DL4 6EU7 6AU8 12AT7/ECC81 12AU7/ECC82 12AX7/ECC83 12AY7 12AZ7 12BH7 12BY7 5751 5814 6189 7119/E182CC 7199 E80CC EF86 Specifications:Material:ABSOption Type:GZC9-C-1;GZC9-C-1-GDiameter:Approx.2.4cm/0.94inMounting screw Hole Distance: 28mm (center to center) Note:Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:5xCeramic Tube Socket