Amazon.com: 6PCS Reducing Telescopic Tube Connector Net Pole Locator Telescoping Pipe Adapter Fixed Lock Buckle Clamp Joint Parts for DIY Outdoor RC Model Toy (6pcs 25-28mm) : Toys & Games
Telescoping Clamp - Maker Pipe
Telescoping Tube Clamp - Connects 1.375" ID Tube to 1.125" ID Tube | DragonPlate