LARGE SILVER HEATSINK, AMPLIFIER, HAM RADIO, DUMMY LOAD - LAST ONE. W = 125mm / 5". D = 135mm / 5 1/4". L = 300mm / 12". This is my last silver heatsink, I have lowered the price by £5 because of the stuck broken drill bit in the face of the sink & it is dented on 1 corner of the heatsink, as seen in photos.