Fischer elektronik 1 1 cool rail 132 x 50mm heat sink fischer elektronik sk 148 100 sa the fischer elektronik 1 1 cool rail 132 x 50mm heat sink has an effective heat dissipation making it ideal for a wide range of applications and has been designed with a base thickness of 5mm fischer elektronik sk 148 100 sa cool rail 132 x 50 heat sink 1 1 c w