$58.99 WYNNsky 1/4-Inch Air Hose Fittings Plug with 1/4'' Hose Barb,ARO Type,10 Piece Air Compressor 
Car Air Quick Connector SF20 Female Hose Fitting Adapter for 1/4 Inch Hose - Walmart.com 
1/4 Inch Male Thread Pipe Barb Hose Tail Connector Adapter 6mm To 12mm | Alexnld.com
