Trong dong ho cao su:
Tot nhat la TNC - PE khung, nam nao cung co tuc = xeng ty le cao, nam nay lai sap co xeng, gia re va chua tang
Toi nhat la DRC - nam nao cung lai tot ma toan in giay lon ban ty le thap chu cha co dong co tuc nao, gia day len qua cao, chenh lech da qua cao so voi CSM, TNC roi, ban thoi