Kit contents Si-20 piston pump with Detection unit, 0.63 m cable 2 anti-vibration rubber dampers Clear PVC tube  int. 6 mm – L: 60 mm, fitted with a « Drain Safe Device » pre-mounted 1.5 m power cable: 2 power wires, 2 safety contact wires. 2-part shell (back plate and cover). Detection unit installation kit: rubber elbow 90° Ø int. 15 x L 152 mm, vent tube Ø int. Ø int. 4 x L 75 mm, 3 double wire clamp 3 screws and plugs for fixing back plate