Top pilot hole can be screwed into with common type "B" steel tapping screw (sold separately) for permanent mount. Also accepts press-in male thumbtack (sold separately) for holding signs firm. Designed to hang a variety of products. High-quality cup with unique reinforcing rings for added strength and long-term holding power. Please note: Temperature and humidity may cause a suction cup to lose its grip. When applied to a clean, dry, non-porous surface above 40°F (5°C), these cups should have an operating range of -22° to 120°F (-30° to 49°C).

• 3/32" diameter top pilot hole size
• Additional sizes available
• Clear UV resistant PVC material - won't yellow or become brittle