Further details for you 
for reduction from cup coupling to ball coupling
Brand
Perrot Color seal
black Construction form
straight Length (mm)
372 Material coupling
steel Material seal
NBR Nominal diameter 1 (inches)
4 Nominal diameter 1 (mm)
108 Nominal diameter 2 (inches)
3 Surface
galvanized System
Perrot/Kardan Usage
tank and silo technology Version
M-part/V-part Weight (kg)
4,847 ø external cup (mm)
162
