This is a new, unused item. The hole size is approximately 5mm. The inside of the cap does not have screw threads; it is a push-in type. A comparison image with a white object is shown in the second photo. We strive to represent the actual color and condition of the product in the photos as accurately as possible, but please be aware that the actual product may differ slightly due to your display and lighting conditions. Thank you for your understanding. It will be shipped via Yu-Packet Post, wrapped in cushioning material. Please only purchase if you understand and agree to the above. #9683l