... front stuck jack is a multipurpose prestress tension equipment QYC240,250,270 Mono Jack for post tension QYC type front stuck ... )K(mm)QYC270270200, 1506337.7Ø18Ø150x56570080200QYC3003002005951Ø18Ø115x58075090200 QYC240,250,270 Mono Jack for post tension