Inner dimension: 19 mm (19#); compatible with laboratory glassware featuring a matching 19/22 joint
Crafted from high-quality rubber material, reusable and essential to avoid cross-use
Excellent craftsmanship with precise dimensions, smooth surface, and durability for long-lasting use
Guaranteed after-sales service: if received defective or damaged item, please contact us. We will definitely help you solve the problem until you are satisfied
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