Vietnamese natural rubber block specifications SVR CV 60 SVR CV 50 SVR L SVR3L and above are field fresh latex materials SVR 5, field latex materials SVR 1 0 CVSVR10 SVR 20 and above are field grade materials SVR3L equivalent to national standard1natural rubber.

The impurity content is 0.03%.

Whiter than 3L, with less impurities.

The color below is dark and there are many impurities.