Complete Size Range: Includes #000, #00, #0, #1, #2, #3, #4, #5, #6, #7, #8. Each size #000 12 pieces (from #00 to #6) comes with 2 pieces, plus 1 piece each of #7 and #8.
Premium Rubber Material: Made of high-density, durable rubber offering excellent resistance against non-aggressive chemicals and concentrated solutions.
Secure Seal Design: Solid construction with no hole ensures leak-proof performance for flasks, test tubes, bottles, and more.
Wide Compatibility: Ideal for educational, laboratory, essential oil containers, and scientific experiments.
Product Guarantee: If there is any problem with the product, we are ready to assist you!