a4 white cardboard 180g (medium)(A4 白卡纸180g （中等）) a4 white cardboard 200g (medium thickness)(A4 白卡纸 200g （中厚）) a4 white cardboard 230g (thickened)(A4 白卡纸 230g （加厚）) a4 white cardboard 250g (very thick)(A4 白卡纸 250g （很厚）) a4 white cardboard 300g (extra thick)(A4 白卡纸 300g （特厚）) a3 white cardboard 180g (medium)(A3 白卡纸 180g （中等）) a3 white cardboard 200g (medium thickness)(A3 白卡纸 200g （中厚）) a3 white cardboard 230g (thickened)(A3 白卡纸 230g （加厚）) a3 white cardboard 250g (very thick)(A3 白卡纸 250g （很厚）) a3 white cardboard 300g (extra thick)(A3 白卡纸 300g （特厚）) 8k white cardboard 180g (medium)(8K 白卡纸 180g （中等）) 8k white cardboard 200g (medium thickness)(8K 白卡纸 200g （中厚）) 8k white cardboard 230g (thickened)(8K 白卡纸 230g （加厚）) 8k white cardboard 250g (very thick)(8K 白卡纸 250g （很厚）) 8k white cardboard 300g (extra thick)(8K 白卡纸 300g （特厚）) 4k white cardboard 200g (medium thickness)(4K 白卡纸 200g （中厚）) 4k white cardboard 230g (thickened)(4K 白卡纸 230g （加厚）) 4k white cardboard 250g (very thick)(4K 白卡纸 250g （很厚）)

20 sheets(20张) 50 sheets(50张) 100 sheets(100张)