... , optimumTemperature of 10 to 25 degrees Celsius, a maximum of 30Degrees Celsius, a minimum of not less than 4 degrees Celsius, or thermostat measures should ... ,15. Material: GCr15, SiMn etc8 feature: low noise, long life ,high precision,9 apply: machine tools, electrical ,railways,automotive,construction machinery ... +pallet.(according to your requirement ) YNN needle roller bearing in high precision