- 500 transparent PVC shrink bands, size 45 x 23 mm, ideal for sealing bottles and jars - Compatible with droppers, laboratory jars, and bottles with a diameter of 19 to 25 mm - Durable, perforated material that makes application easy and ensures a secure seal - Easy to apply: simply position the band on the mouth of the container and apply heat for a perfect fit - Suitable for Boston round bottles and other liquid laboratory or industrial containers - Enhance product presentation and safety, preventing tampering and leaks - It is recommended to measure the diameter of the container before applying to ensure compatibility