- Art.1601 - Covered metallic springs, mm.15x1
from cm.12 to cm.44
- Art.1605 - Covered metallic springs, mm.20x0,5
from cm.20 to cm.30
- Art.1607 - Metallic spiral springs, mm.7
from cm.10 to cm.40
- Art.1611 - Metallic spiral springs, mm.11
from cm.10 to cm.40
- Art.1615 - Covered metallic springs, mm.15x1,5
from cm.32 to cm.38
- Art.1620 - Covered metallic springs, mm.20x0,8
from cm.20 to cm.52
- Art.1635 - Covered metallic springs, mm.12x0,35
from cm.16 to cm.36
- Art.1650 - Covered metallic springs, mm.15x0,5
from cm.20 to cm.40
- Art.1680 - Covered metallic springs, mm.15x0,8
from cm.20 to cm.52