I bought this thermal pad only for Arctic 4237 - thermal pad 145 x 145 x 0.5mm simply because it is perforated in its photo. For the sake of simplicity, I went with this much smaller and much more expensive blade. However, this product is not perforated and therefore the purchase was a waste of time. If you need a perforated thermal pad set, don't waste your time here. I'll be returning this quickly and buying the larger and cheaper Arctic 4237 pad I mentioned earlier.