A third of them are open to general start-ups, irrespective of sector. The number of spaces available for start-up enterprises/teams in each incubator ranges from 10 to 48. The throughput of enterprises through the incubators on an annual basis depends on the number of incubating spaces and the policy on tenure of incubator tenants. For example, the SFD incubators in Egypt and the Dubai SME incubators allow the start-ups to remain in the incubator for up to 36 months, whereas, the IN5 Incubator in Dubai seeks to spin out 15 new enterprises per quarter (from entrepreneurial teams of three members), this would produce 45 new start-ups per year.