Replacing thermostats on Indesit IS60V Tumble Dryer?

I have a set of replacement thermostats for an Indesit IS60V tumble dryer (code 1703037). The original set of two includes an orange spot one. The new replacements appear to be cheap ones from China (KSD301A) and are not marked with an orange spot, but are rated at 120 degrees and 150 degrees. They are described as a suitable replacement for the set that I am replacing.

Please can someone confirm that they are safe to use as a replacement, and if so which one should replace the orange spot item (120 or 150 degrees)

Thankyou

Tony_Hove
September 2009