Belton Vacuum Tube Shield For 9 Pin / Miniature Type, Aluminum, High Quality High quality Belton Aluminum Tube Shield for Vacuum Tube Sockets. Aluminum Tube Shield for Vacuum Tube Sockets. Keep your preamp tubes safe! Also prevents unwanted audio interference 1 1/8 Mounting Center 1 15/16 tall without base, 2 1/8 tall with base Spring inside shield to keep tube stable For use with Belton Sockets: VT9-PT-C, VT9-ST-2, or VT9-ST-1