That it but probably some confusion regarding the compatible lawnmowers are, here is a list of Mow are times suitable for this knife (the type label can be found after removing the collecting basket):
3600 H81 A00 ROTAK 34
3600 H81 A01 ROTAK 1400
3600 H81 A02 ROTAK 340
3600 H81 A03 ROTAK 34
3600 H81 A04 ROTAK 1400
3600 H81 A30 ROTAK 34
3600 H81 A32 ROTAK 34
3600 H81 A33 ROTAK 340
3600 H81 A40 ROTAK 34
3600 H81 A70 ROTAK 34
3600 H81 A71 ROTAK 34 GC
3600 H81 A72 ROTAK 34
3600 H81 A73 ROTAK 34 GC
3600 H82 000 ROTAK 34 (ERGOFLEX)
3600 H82 030 ROTAK 34
3600 H82 040 ROTAK 34 (ERGOFLEX)
3600 H82 070 ROTAK 34
3600 H82 0B0 ROTAK 34 (ERGOFLEX)
3600 HA4 000 Rotak 34
3600 HA4 001 Rotak 34 R
3600 HA4 002 Rotak 33
3600 HA4 003 Rotak 34 M
3600 HA4 070 Rotak 34
3600 HA6 100 ARM 33
3600 HA6 101 ARM 34
3600 HA6 102 ARM 34 R
3600 HA6 103 ARM 3400
3600 HA6 130 ARM 34
3600 HA6 140 ARM 34
3600 HA6 170 Rotak 340 ER
3600 HA6 171 Rotak 340 ER
3600 HA6 172 Rotak 340 R
3600 HA6 177 Rotak 34-13
3600 HA6 1B0 ARM 34
3600 HA6 203 ARM 3650
3600 HA6 272 Rotak 37-14 Ergo
3600 HA6 273 Rotak 36 R
3600 HA6 275 ARM 360
It is important, especially the agreement of the type code 3600HAxxx!