- Coarse, smooth and round thread, no burr, durable. The inner diameter of the coarse teeth is 7.5cm, the outer diameter of the outlet is 6cm, and the height is 13.7cm. 2. Integrated aluminum foil seal, well fit without leakage 3. Reinforced rib design, the bottle cap adopts the reinforced rib design only to be firmer and increase the strength of the bottle cap to make it easier to slide 4. Reinforcement ribs, just for stronger, contain gaskets, which are corrosion resistant, acid-based and oil-resistant. 5. Experience the sun and rain, not afraid of corrosion, using precision casting technology, can be used in various harsh conditions. Anti-oxidation, corrosion resistance, high temperature resistance