Aluminum round standoffs are straight round shape,which is most common and popular one.
Customized size,shape and color are available.As for the most popular types, M3x10mm,M3x15mm,M3x20mm,M3X25mm, M3X30mm, M3X35mm length round standoffs etc, are often in stock, which could be shipped timely.
Color for reference: black, red, blue, purple, pink, green, silver,orange, gold.