Cary 33mm ID 5mm Thickness Tube Dampers Silicone O-ring Amp for Shuguang 6l6g 6l6gc 6ca7 6l6gcr 10pcs Condition: New Quantity: 10 pieces For Shuguang vaccum tube 6L6G 6L6GC 6CA7 6L6GCR ID: 33MM Thickness: 5MM