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Product Details ”Click here for full size image” Big TO-220 - Heatsink Retail: $0.59 Your Price: $0.45 You Save: 23.73% Email a Friend | Need Help? This is about as big as it gets for a TO-220 heatsink; these are 3" tall, an inch deep and 1&5/8" wide. We have a large supply of these so if you have a serious cooling problem we may have the solution. Customer Reviews Write an online review and share your thoughts with other viewers!