It fits any of my fuse blocks (Stinger, Knuconceptz). It didn't explode so I can't vouch for intended performance. The quality and finish is on par with anything I've worked with in the past. However, this is tremendous value. These 10 packs are the best value I could find and cost less than many 2 packs. I'm willing to bet that most fuses of this type, regardless of brand, are made in one of very few places. You can't go wrong here. I have purchased other Conextlink products including wireless power cords and have been particularly impressed with the value of their products. Nothing fancy, great price, highly recommend.