Thermostats & cut-outs: Contact rating : 230 v, 20 amps. Temperature range :as per requirments Tolerance on operating temperature : within +T-ª6 +T-ªc. Maximum differential temperature : 10 +T-ªc. Insulation level : 1.0 kv for 1 minute. Stem lengths available : as per requirment Heaters: Insulation level : 2.0 kv for 1 minute. Ratings : from 30 upto 300 watts Depending on customer's requirment.