Gibraltar SC-SBLAM-L Single Ball L-Arm Mount - 12.7mm Thrones The damping material is not

The damping material is not to be put onto the outer surface but is intergrated at the inside and varies in thickness and width according to the drumhead's diameter

hammer-ons

The Full Force™ drumheads feature an acoustically "vented" muffling ring that is tucked into the hoop on the underneath side of the head

fat and punchy pizz

Gibraltar SC-SBLAM-L Single Ball L-Arm Mount - 12.7mm Thrones The damping material is notThe Single Ball L Arm Mount is a single tom arm that clamps directly to a cymbal stand. The clamp attaches to 1 2 to 1 diameter tubes. Use to mount toms, electronic drums, and percussion accessories. Single tom arm that clamps to a cymbal stand Attaches to 1 2 to 1 diameter tubes Mount toms, E drums, and percussion accessories 12. 7mm L arm diameters