Closer cap options:
xxxxxxxC = metal cap with chain
xxxxxxxO = metal cap with plastic binder
xxxxxxxP = plastic cap with plastic binder

Body option:
xxxxxAIx = stainless steel 
CodiceSerieD (mm)GHCHCH1S max.PN (bar)
S11616X150S8M 16x1,580191920630
S11618X150S10M 18x1,582222220630
S11620X150S12M 20x1,584242420630
S11616X15CS8M 16x1,580191920630
S11618X15CS10M 18x1,582222220630
S11620X15CS12M 20X1,584242420630
S11616X15PS8M 16x1,580191920630
S11618X15PS10M 18x1,582222220630
S11620X15PS12M 20x1,584242420630
Note

QTY + -