Topre silencing rings

PORON side up, or PET side up?

Can't decide which way your silencing rings go on? Let the ring decide.

PORON

A microcellular polyurethane foam. Soft and compressible, it springs back to shape instead of taking a permanent set.

PET

Polyethylene terephthalate — a thin, rigid polyester film. Smooth, low-friction, and essentially non-compressible.

Flip a whole board

Pick your layout and every switch gets its own independent coin toss.