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Universal Valve Springs, Brass Instrument, Bottom Action Springs, Set of 3:
$9.99
Universal brass instrument valve springs. Tapered cornet & trumpet (& others), bottom action valve springs. Wide end fits into bottom cap.A370 top OD 12mm, bottom OD 20mm, length 45mm.A371 top OD 12mm, bottom OD 15mm, length 40mm. Confirmed fit for aCouesnon trumpet from the 1960s.
