PS3 Fat Slim Copper Pad Shims Shim Heatsink YLOD Repair Kit Fix + Thermal Paste Shims are used between the CPU/GPU and heatsinks to provide better cooling for your PS3 Shims are 42MM X 42MM and are 1.2MM thick 100% copper, cut and polished Contents = 2 shims + 2 syringes of high quality silver thermal compound