Bay Rafter 2.5 allows the installation of a max two 2.5" HDDs or SSDs in a 3.55" bay and provides a fitting opportunity for a fan with 80, 70 or 60 mm in size. By this, users can perfectly choose between high cooling power, low noise level or passive mode.

http://www.scythe-eu.com/en/products...rafter-25.html

Another less fancy tool: http://www.scythe-eu.com/en/products...ounter-25.html