Aluminum Alloy Whistle

Compact solid aluminum alloy whistle with integrated split metal key ring. Single unit dimension measures 1.77 inches in length and 0.32 inches in diameter. Surface finished with uniform anodized coating, offered in seven standard stock colors: silver, green, blue, gold, black, purple, red. Custom marking is supported via laser engraving; the maximum imprint dimension is 0.16" × 0.59" on the whistle body. Hard alloy structure provides durable anti-rust performance for long-term bulk promotional distribution, compatible with customized brand logo marking for advertising merchandise programs.