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any size can be customized,(可定制任意尺寸，)

15*20(100 pcs)(15*20（100只）) 15*25(100 pcs)(15*25（100只）) 20*25(100 pcs)(20*25（100只）) 20*35(100 pcs)(20*35（100只）) 20*40(100 pcs)(20*40（100只）) 40*50(100 pcs)(40*50（100只）)