It is a new product which can use to build a dust free classroom. 
Non-toxic,Harmless, Dust Free, Writing clear and smoothly, easy dry and erase off.
4 basic color : White,Red,Blue,Yellow
Certificate: ROHS(EU),ASTM D-4236(US),TRA(UK)
Capacity : 9.5ML
Application place : Glass, Mirror and all the smooth place can be wrote. 
It can be recyclable and nib can be replaced if broken. 
Price is competitive. 

Comparing with the usual marker pen , its advantage as below :

1. When writingwith ocean ink, the writing gets dry in several seconds and can be erased very easily. Because it becomes a thin film when dried .

2. Refill our ink to the pen unlimitedly . So that will save much costs.

3. Can replace the nib of the pen .

4. Don’t contain any poisonous substances

5.  Non-toxic, harmless and pollution-free. It meets the EN71-3 (EU)  and the ASTMF963-03 (United States) testing standards of SGS.

6. We are the inventor and builder in this industry.

Guangzhou Ocean Environmental Technology Company., Limited. Is a high tech company focusing on R&D, Production and sales of environment-friendly board-writing devices.

We are committed to build a dust free classroom and writing healthily every day !

Welcome to contact and visit us !

Doris 
Guangzhou O.C Environmental  Technology Co.,Ltd
Factory Add:4F Block A .Yushu Industry Science city.Guangzhou.PRC. China 510663
MOB:　+86-15018733690  Tel:8620-82260090 82260405 Ext:837
Fax:　8620-82261969
Webside: www.gzocean.com.cn
E-mail:　wdx@gzocean.com.cn
Skype: wudouxidoris