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High-temperature silicone damper/dampener rings are great for remedying microphonic oscillations and tube rattle. These red dampening rings are rated for temperatures up to 240°C and come in various sizes to fit a variety of tubes. Please verify your tube sizes to ensure a proper fit.
20mm: Recommended size for 12A_7 (i.e. 12AX7, 12AT7, 12AU7, etc.) types, EL84, or any other tube with a ~20mm diameter.
28mm: Recommended size for 6V6, 6SN7, 5AR4, or any other tube with a ~28mm diameter.
30mm: Recommended size for some EL34, Svetlana EL34, JJ GZ34, Gold Lion KT77, or any other tube with a ~30mm diameter.
32mm: Recommended size for some EL34, 6L6, 6CA7, or any other tube with a ~32mm diameter.
35mm: Recommended size for 6L6GC, 5U4G, 6146B, or any other tube with a ~35mm diameter
