IS-139 Think Safety Sign – Ensure Workzone Visibility & Compliance | Interwest Safety Supply

Command attention and uphold the highest safety standards with Interwest’s IS-139 Think Safety sign. Engineered with heavy-duty .080″, 5052-H38 aluminum and premium 3M Engineer Grade reflective sheeting, this sign surpasses MUTCD specifications to ensure optimal visibility and durability in any work zone. Its 18″ x 12″ size and pre-punched mounting holes make installation a breeze, safeguarding your project with minimal effort. Ideal for conscientious project managers, this sign is a steadfast ally in your commitment to protect workers and the public. Elevate your safety measures—secure your IS-139 Think Safety sign today and lead with confidence in work zone caution.