规格20MM(单开一字/一盒12个,一箱600个),25MM(单开一字/一盒12个,一箱600个),32MM(单开一字/一盒10个,一箱240个),38MM(单开一字/一盒10个,一箱240个),50MM(单开一字/一盒10个,一箱120个),63MM(单开一字/一盒6个,