Our CO2 bottle caps are an essential tool for any DIY aquarium CO2 system. They provide a secure and efficient seal, ensuring that your CO2 generator operates smoothly. With their easy installation, compatibility with various bottles, and replaceable design, these caps meet all your CO2 generation needs, promoting a healthy and vibrant aquarium environment. Features -Color:Beige -Material:ABS -Size:3.30X3.30X3.00cm/1.30X1.30X1.18in -Secure tightening: quick tightening design a secure seal, preventing co2 leakage and maintaining gas purity -Versatile fit: precision manufacturing allows compatibility with various standard co2 cylinder interfaces -High pressure stability: made from high pressure resistant materials, ensuring the stability of the cap and bottle -Easy portability: compact and lightweight, ideal for outdoor activities like barbecues and camping -Prolonged co2 storage: efficient sealing technology minimizes gas loss, extending the co2 usage time inside the bottle for long term storage Package list: 5 x bottle cap