Air through freely and work without a for . Compatible for . Upgraded heavy duty brass air make it easier locking onto - air leakage ever since. When use the air to inflate a tire or measure pressure, please use the clip to secure the to the for for sealing. 1/4" female , compatible for most tire inflator, wheel pressure gauge and compressor. Straight tip is suitable for all vehicles. Package includes: 1 Pcs Brass Air .