This package of Ultra-Suede contains two sheets, one Black (thicker) sheet and one Gray (thinner) sheet.
Both sheets are high density Ultra-Suede which is and excellent silencer material.
The Grey Ultra-Suede is thinner and more useful on smaller keys such as the top stack of alto saxophone,
flute and clarinet and will not compress a readily as felt or the thicker ultra-suede.
Excellent for noise reduction where a thin cork might other-wise be used.
The Black Ultra-Suede is thicker and will be more useful on larger keys where noise reduction is essential such
as the lower stack keys in a Tenor Saxophone.