Features Detection Function: This propane tank adapter has a leakage detection function. If a leakage is detected, the instrument will restrict the flowing to defend you. Monitor Oil Level: The copper adapter with pressure gauge can monitor the oil level without disassembling the oil tank. Color-coded dial lets you know propane status at a glance. There are three levels here, natural gas, low gas and supplemental. Perfect Adaptation: Our propane tank adapter can perfectly adapt to most of the instruments, you don't need to worry about any non adaptation, just use it with confidence. Easy to Carry and Store: The compact size of this propane tank adapter means it is easy to carry and can be easily stored when not needed without taking up much space. Applicable Scenarios: This propane tank gauge level indicator is compatible with all devices for QCC1/1 type connections for 20lb to 40lb propane tanks. Specification: Item Type: Propane Tank Adapter Matrial: Copper Package List: 1 x Propane Tank Adapter Note: Manual measurement, the specific size shall prevail in kind. Package List 1 x Gas Tank Adapter