This is the umbrella from the Maxis “Eco-Freak” Teak Umbrella Table, without the table.
Available in Room > Outdoor > Patio Furniture and Function > Decorations > Misc for §85; colour options are the same (26 if I’m counting correctly) as for the table, textures are referenced from that.
High Poly: 281V/284F
Mid Poly: 230V/210F
Low Poly: 217V/204F
High Poly Sun Shadow: 264V/260F
Mid/Low Poly Sun Shadow: 213V/186F
Milkshape/TSRW, s4pe, ModdingToolkit.