1. Hole diameter of about 6mm, suitable for thimble 6mm or so canopy rod 2. Easy to pull out/insert, convenient to use 3. TPU material, insulation and anti-static, soft and good corrosion resistance 4. Purpose: Used for the top of the canopy pole to prevent thunderstorms 5. Material: TPU 6. Size: about 5 x 7cm 7. Weight: about 27g 8. Note: only the protective cap, does not include other items in the picture