[ (加厚款)2把混装(1把15cm+1把20cm) ]
[ (加厚款)2把15cm(颜色随机) ]
[ (加厚款)3把15cm(颜色随机) ]
[ (加厚款)4把15cm(颜色随机) ]
[ (加厚款)2把20cm(颜色随机) ]
[ (加厚款)4把20cm(颜色随机) ]
[ (加厚款)4把混装(2把15cm+2把20cm) ]
[ (加厚款)6把混装(3把15cm+3把20cm)送1支笔 ]
[ (加厚款)6把15cm\\送1支笔(颜色随机) ]
[ (加厚款)6把20cm\\送1支笔(颜色随机) ]