Universal bottom action valve spring, euphonium, baritone, & others, set of 3 or 4. Allied P/N A380, D16.3mm x L50mm. See my item ID# 28067 & 28068 for a universal sousaphone tuba spring that is a bit heavier and longer (D16.3mm x xL53mm). For additional springs, see my valve spring reference chart.
