Learning Cards For Adults YH1020Specifications:Name:Learning Cards For Adults YH1020Material:1) 300gsm Chinese C2S, cheapest materails ... bluecore, better than C2S, perfect for AD cards. 3) 310/330gsm German blackcore, best materials for cards all over the world, tenacity ... 32mm is available.5) Also different materials for box & cards can be chosen for certain target prices.Size:41x63mm, 57x87mm, 62X87mm ...