These are Mini E-Z Connectors for Park Flyers by Dubro.
FEATURES
Aluminum Construction
INCLUDES
Two Connectors
Two Screws
Two Washers
REQUIREMENTS
Nothing
SPECIFICATIONS
Length: 4.8mm (3/16")
Diameter: 3.2mm (1/8")
Weight: 0.25g (0.0088oz)
COMMENTS
Maximum pushrod diameter is .047 - 3/64" (1.22mm)