home -> on-line catalog -> referee tent -> referee whistles Referee Whistles Acme Thunderer 58 Biggest (2.25" or 5.7cm) Strongest, Tough Industrial Grade, Solid Brass Pea Whistle. Deeper pitch. $15 Acme Thunderer 60.5 Small, Solid Brass, Silvery Finish Pea whistle. Tapered Mouthpiece. Produces high pitch. $8.75 Acme 660 Small, plastic Acme whistle. High pitch. $3.50 Qty: Style: Acme Thunderer 58 ($15) Acme Thunderer 60.5 ($8.75) Acme 660 ($3.50) ©2008 BALL'S OUT! Rugby Goods. All rights reserved.