[jiangsu, shanghai, zhejiang, anhui-5 pack]] [jiangsu, shanghai, zhejiang, anhui-3 pack]] [other provinces-5 packs]] [other provinces-3 packs]] [inner mongolia, gansu, ningxia, qinghai-5 packs]]

35*19*23 ultrahard [shoe box size]] [light small pieces] 40*30*20 ultrahard-no buckle [for book holding] 40*30*30 ultrahard-no buckle [for book holding] 40*30*30 ultrahard-with buckle [for book holding] 40*30*30 ultrahard-plastic buckle 50*35*30 ultrahard [no buckle]] 50*35*30 ultrahard [with buckle]] 50*35*30 ultrahard [plastic buckle]] 50*40*40 ultrahard [no buckle]] 50*40*40 ultrahard [with buckle]] 50*40*40 ultrahard [plastic buckle]] ultrahard 60*40*50 [no buckle]] ultrahard 60*40*50 [with buckle]] ultrahard 60*40*50 [plastic buckle]] 70*50*50 [oversized] ultrahard no buckle 70*50*50 [oversized] ultrahard has buckle 70*50*50 [oversized] ultrahard plastic buckle