Gelid's Tranquillo 4 heatsink is a 152mm tall tower cooler with a few subtle refinements that enable it to eke out good thermal performance at low cost. If you're simply searching for a straightforward CPU heatsink, the Tranquillo 4 will get the job done admirably for around $45.
Gelid's Tranquillo 4 heatsink ships with a single 120mm PWM fan rotating at 1600-750RPM that moves upwards of 65CFM at 2.18mmH2O pressure, according to manufacturer specs. The fan is held in place with good reliable metal spring fan clips and an extra set is supplied so users can install their own second fan if desired. Finally, Gelid supply a small syringe of Gelid GC-Pro thermal paste.