Round Playing Cards YH1021Specifications:1. Material: 1) 300gsm Chinese C2S, cheapest materails with amazing performance, perfect if you trying to find a balance between materials and costs.2) 270gsm Chinese greycore/ bluecore, better than C2S, perfect for AD cards. 3) 310/330gsm German blackcore, best materials for cards all over the world, tenacity, S, deflection , A-. most expensive.4) Plastic ...