how to setup turret?

[PenjualSabu]

how to setup turret? it's always said "not enough resources to set up a guard tower...." already buy item from rare tool npc, pls help

 

[Prowler]

Probably you bought wrong one, You need orange, not purple

 

[PenjualSabu]

Probably you bought wrong one, You need orange, not purple

thank you sirrr !

 

[username99]

What materials are used for the turret?