Amazon.com: SUNGATOR 12-Pack Air Hose Fittings, 3/8" Barb to 1/4" NPT Air Hose Repair Kit with Sealant, 3/8" Barb to 1/4" NPT Air Hose Barb Fitting, Brass Barbed Air Hose Repair Connector
Quick-Fix Kit, For 1/2" Hose with 1/2" Fittings
Screw On Reusable Hose Stem 1/2 I.D. X 1/4 Mpt | Air Hose Repair Fittings | Air Hose & Accessories | Shop Supplies and Safety | Wurth USA
Pronese 2 Pack Soild Brass HPT Air Reusable Hose Splicer Repair Kit,Air Hose Fitting for 1/4-Inch ID Hose - Amazon.com