Auxiliary springs:
red 1.1mm wire, 54837072000
blue 1.2mm wire, 54637072500
yellow 1.3mm wire, 54637072300
green 1.5mm wire, 54837072100 (9 coils)

Adjustment springs, long spring:
1.8mm wire, 65mm length, 54637072000
1.9mm wire, 65mm length, 54837069000 (wound left-hand)
2.0mm wire, white painted, 65mm length, 54637072100(No longer available, superseded by 1.9mm wire)