Our most popular whistle, the Acme 477.58.5 Hockey Referee Whistle has a tapered mouthpiece. The favourite for years among hockey officials with its familiar deep tone. Rubberized finger grips and plastic mouth piece cover included. Order an extra to keep in your bag. All good officials carry a spare. Ordering with other products at the same time saves shipping costs. These whistles can be personalized with engraving (see Presentation Whistle category below). Discounted pricing for 12 or more (see Bulk Discount category).