Features:
Used to fix convergence deficiencies and athletic training.
Develop good binocular functionality; in other words, have both eyes work well together.
This activity teaches convergence - the ability to point your eyes more accurately at a target.

Specification:
Material: Metal + Nylon + Plastic
Size: 11.7*8.7cm,Rope length 204 cm
Weight: 85 grams
Color: as pictured

Package Includes: 1* polydisperse ball

Notes:
Please allow minor errors due to manual measurement.
The colors may be a little difference for the different monitor display.