[TRS One RR 2019 front fork/Steel or aluminum tubes?]

Thank you! so I need steel tube type.

[TRS One RR 2019 front fork/Steel or aluminum tubes?]

Hi to everyone!

I have TRS One RR 2019 with bright gold tone front fork tubes and gold tone cups. Can you give me idea what spring should I use. 

for steel tube https://www.ebay.com/itm/Jitsie-Uprated-Front-Fork-Spring-GasGas-Sherco-TRS-Vertigo-Scorpa/223921140082?var=522662522667

or 

for aluminum tubes  https://www.ebay.com/itm/Jitsie-Uprated-Front-Fork-Spring-GasGas-Sherco-TRS-Vertigo-Scorpa/223921140082?var=522662522662

Thank you.

William.