4 or rather 6 wires of Nitinol brought together into a twisted top of stainless steel.
Pull rope made out of a strand of stainless steel or rather a continuous Nitinol wire (Lithotripsy capable basket) and a pull rod out of stainless steel.
Explanations
DØ - diameter of wire
KØ - diameter of basket (15, 20, 25, 30, 35 mm)
Form - GF: twisted form, DF: diamond form
x - Litho: lithotripsy capable, Fü: guide wire capable
(only KØ 20, 25, 30, 35)