... /900g per box Bulk CTC black tea WonFa can export more than 4000 tons of various CTC black tea per year , our CTC ... grades .The history of manufacturing CTC black tea for WonFa has 18 years , it was called “tea ball” in 1990s ,the diameter is ... or 0.8-1 cm which was used for the tea bag ,the diameter is 1.2-2cm which was packed ... get the best CTC ,which tastes strong ,brisk ,fresh . CTC black tea(WF5511)