You searched for "large rectangular"
SPREADFAST
Heatsink, Universal Square Ceramic, 3.1 °C/W @ 400 lfm, 5.8 °C/W @ 100 lfm, 85 x 85 x 6mm, Adhesive, Screw
Part: SF-CHS-858506F
Large ceramic square heatsink for high-voltage electronics and power cooling.
Fischer Elektronik
Heatsink, Universal Rectangular Alu, 74K/W, 8 x 8 x 6mm
Part: ICKSMDF8SA
Very small heatsink for DIL integrated circuits and micro-components cooling.
Fischer Elektronik
Heatsink, Universal Rectangular Alu, 42K/W, 17 x 8 x 6mm
Part: ICKSMDF17
Small universal aluminum heatsink for DIL-IC and integrated circuit packages.
Fischer Elektronik
Heatsink, Universal Rectangular Alu, 71K/W, 10 x 8 x 6mm
Part: ICK SMD F 10 MI
Tiny surface-mount aluminum heatsink for integrated circuits.
Fischer Elektronik
Heatsink, Universal Rectangular Alu, 71K/W, 10 x 8 x 6mm
Part: ICKSMDF10
Tiny aluminum heatsink for DIL-IC integrated circuits in compact applications.
RS PRO
Heatsink, Universal Rectangular Alu, 22K/W, 23 x 23 x 6mm, Adhesive Foil
Part: 750-0894
Small adhesive heatsink for cooling semiconductor devices and BGA components.