Material: Phenolic resin, polyethylene Color: Black Inside Diameter: 33 mm (1.3 inch) Outer Diameter: 36.4 mm (1.43 inch) Height: 12.5 mm (0.49 inch) Key Benefits: Made from durable phenolic resin and polyethylene for resistance to pressure during fermentation. sealing performance to help maintain the freshness of craft beer, wine, and other beverages. Reusable and easy to clean, offering long service life and convenience. Designed to prevent leaks, ensuring safe transport and storage. Features and Performance: Reliable sealing capability suitable for both home and commercial brewing needs. Raised ridge around the cap circumference provides better grip for easy tightening and opening. Compatible with screw glass growler bottles, beer bottles, gallon jugs, fermentation containers, and various packaging bottles for food, cosmetics, and daily chemical products. Formfitted design allows the phenolic resin cover to fit securely into the sealing area for airtight closure. Use Scenarios: 1. Brewing and fermenting craft beer or wine, where pressure resistance and airtightness are critical for quality preservation. 2. Transporting filled growlers or gallon jugs without risk of leaking during travel or delivery. 3. Sealing glass planting cups or chemical containers to preserve contents and prevent spills. Applications: Brewing and fermentation processes for beer, wine, and other beverages. Packaging solutions for both soft and hard bottle types in food, cosmetics, and daily chemicals. Storage of fermentation and filmforming chemicals requiring tight, secure sealing. This sealing screw cap combines strength, reliability, and ease of use, making it ideal for a wide range of industries and applications that demand secure, leakproof closures.