United States
1set Children Training Diameter String Vision Convergence Insufficiency Tool Eye Care Tools New
Description:
Brock String - used in fixing convergence insufficiency and sports training.
The basic purpose of the Brock String is to develop good binocular functions; in other words to get both eyes working together well. This activity teaches convergence - the ability to point both eyes more accurately at a target.
Size:Beads diameter:1.8cm(0.7'')
Rope length:250cm(98'')
Package includes:
1pc x Cord
3pcs x Beads
1pc x Adhesive Hook
1pc x Measuring Tape
1pc x Case
Processing time
According your order list. we will supply delivery time .
Commonly is 5-7 work days after we confirm payment
Shipping time
By Express : 3-7 days . Door to door service
By Air : 3-7 days . (the goods arrival at your local air ports
By sea : 30-40 days (the goods arrival at your local sea ports )
PS : by air or by sea, if you need door to door service, please tell us . we will help you checking the extra door to door cost.
How many months warranty do you provide ?
one year
What should I do if the machine have question ?
For ensuring all the items are in good quality, we will test all products before the packages were sent out. Once the machine have some question, please don't worry. kindly send us some images of the situation , Video and machine series, and explain the question in where . we will supply solution to you deal soon.
What should I do if the spare parts is broken in Warranty ?
If in Warranty, some spare parts broken in the Use. kindly supply picture or video , and machine series number .
We will send the spare parts by express to you soon.. and we bear express cost .
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