Following discussions about melting bullet fuses where as the fuse strip heats up, the plastic melts and the fuse squashes in the holder spring. So I ordered a pack of 20 fuses from Frost Auto Restoration at £1.60. 2ytTotal including post and VAT was £4.38. And this arrived.. The fur is real fur on our cat who is sitting on my lap. The 10 creamy bodied fuses _are_ ceramic. They make nasty noises when I try to scrape them with a knife. The 10 white bodied fuses are _plastic_ and can be cut with a knife.. thermal tests to follow... I shall get in touch with Frost's and see what they say.