Express genes are available in the following DNA prep sizes: 1 μg - 4 μg, 4 μg - 10 μg, 10 μg - 100 μg and 100 μg - 1 mg. Turnaround time increases with prep size and is as follows: 4-7 business days for 1 μg - 4 μg and 4 μg - 10 μg, and 7-10 business days for 10 μg - 100 μg and 100 μg - 1 mg. The same shipment format options are available for Standard and Express genes.