CCT-M modular tank system accessories – parts LIS (LI1, LI2, LI3, LI3 of the modular tank scheme). The optional part of the CCT-M tank : the level indicator set allows showing level of the product in the tank. The LIS set consists of four parts : LI1 – upper LI connection part, LI2 – lower LI connection part, LI3 – glass tube, LI4 – protector of glass tube.