Amazon.com : Gardena 36004 5 Piece Quick Connector Starter Set, for Any 5/8 Inch or 1/2 Inch Garden Hose, Sprinkler or Spray Nozzle, Made in Germany (Inner Product Color May Vary) :
Amazon.com : Gardena 39022-G Premium Metal Watering Accessory Adapter, For Adapting Watering Accessories to the Original Gardena System : Garden Hose Parts : Patio, Lawn & Garden
Gardena 3/4 in. Metal Threaded Male/Female Hose Connector - Walmart.com