The 120mm PWM fan spins at 1600-800RPM and draws power from a standard 4-pin motherboard fan header. Four 6mm diameter copper heatpipes rise up through bare aluminum fins spaced 80mm apart. Every other heatpipe is offset to the left 11mm to stagger the heatpipes as they intersect the fin stack. Each aluminum fin measures 0.2mm thin and is spaced 1.7mm apart. Typically, aluminum fins are 0.3-0.4mm thick.

Glacialtech's Igloo H46 heatsink stands 158mm tall, the bottom-most fin being 34mm above the CPU socket for clearance. The fin tower measures 50mm deep, 112mm tall and 130mm wide. The four heatpipes are swaged into a rather narrow extruded aluminum base plate with a flattened oval profile.

The exposed heatpipe base of the Igloo 46 heatsink measures 40x40mm in size. The four 6mm diameter heatpipes are swaged into an aluminum support plate measuring 40x26.5mm. Additional wire fan clips are supplied so a second 120mm rear mounted fan can be installed, the four small holes in the fins (top view) are where these wire fan clips lock into position.