The modules have a black 6-layer pcb covered by satin black heat spreaders with chrome clips and make for a nice look. The heat spreaders are embossed with the words "Mushkin Enhanced Memory" on each side and have a sticker which tells us which model and the serial number of the unit. To find out what makes these modules tick I need to see what they're made of. The heat spreaders are affixed securely and I do not recommend removing them as it will void the warranty. To ease any curiosity, I'll handle that part for you.