The products are yellow powder which made of PVC (Polyvinyl chloride polymer) and NBR (Nitrile Butadiene Rubber)

They are fine-grained ，resilient ， uniform in apertures and good in ink storage and seepage performances They're new-style eco-friendly stamp which proved to be compliant to EU RoHS directives.

Fine powder:＞200 mesh

Gross power:＜200 mesh