1) 2 kinds: heatsealed teabag filter paper and non heatsealed teabag filter paper

2) 2 color: white and unbleached. 

3) GSM: Heatsealed : 16.5g/m2, 21g/m2, 23g/m2 and so on if you request.
Non heatsealed: 12.3g/m2