Classic Referee Whistle - Illustration for Sports, Coaching & Safety Guides #3422406 (License: Personal Use)

This monochrome illustration depicts a standard metal pea whistle, featuring a cylindrical body, mouthpiece, and a visible internal pea chamber. The whistle is attached to a simple looped lanyard via a small ring, suggesting portability and readiness for use. Fine stippling adds realistic texture and dimensionality, evoking vintage technical drawings or instructional manuals.

Commonly used on sports coaching websites, physical education resources, safety training pages, or product listings for referee gear; matches user intent for visual reference, educational content, or iconography.