Air Horn Refill Canisters (Gas Horn Bottles)

These replacement air horn canisters are designed to fit portable gas-powered fog horns and signal horns commonly used in marine and outdoor settings. We offer two types to match your horn device: one for snap-on (button type) mechanisms and one for screw-on mechanism. Each canister is filled with pressurized gas (non-CFC, environment-friendly formula) that emits a loud, piercing horn blast when released. The standard can size is 300 ml (approximately) which provides many short blasts or several prolonged signals. The snap-on type (push-in) canister simply clicks into horns that have a plastic head with internal pin – our SKU 00533 corresponds to this type. The screw-on type has threaded top (usually 3/8" thread) and twists into horns with a screw valve – SKU 00533-1 is for these. All our canisters are made of sturdy metal and sealed to prevent leakage. They have a shelf life of several years, but it’s good practice to check the horn periodically. When your horn’s sound weakens, it’s time to replace the can. By keeping an extra Five-Marine gas horn canister onboard, you ensure you’ll always be able to produce the required sound signals (e.g., fog signals, distress signals) per maritime rules. These refills are compact and portable, suitable not only for boats but also for sports events or emergency use on land.