Cloth cap with small visor.
The item id for PS Police Cap in unturned is 59152. You can use this ID with the commands below to spawn the item, give it to a player or buy it on a modded economy server.
Useable: Clothing
Size_X: 1
Size_Y: 1
Size_Z: 0.31
Armor: 0.95
Blueprints: 2
Blueprint_0_Type: Apparel
Blueprint_0_Supply_0_ID: 59152
Blueprint_0_Product: 59002
Blueprint_0_Products: 2
Blueprint_0_Build: 32
Blueprint_1_Type: Repair
Blueprint_1_Supplies: 1
Blueprint_1_Supply_0_ID: 59002
Blueprint_1_Supply_0_Amount: 1
Blueprint_1_Build: 32
Quality_Min: 75
Quality_Max: 100