Product review (5 stars): BAM!  It's like science!  SPOILER ALERT!  Holy Jamoly!
Holy Jamoly!  Not only were there 5 pcs, they were indeed black with silver overlay, and they very much appeared to be a replacement set for an electric range.  This pack came with everything.  It had many convenient conversion doohickeys to fit on the back of the hijamawhatzits which allowed them to fit onto different posts.  Additionally - and this is the big reveal - (SPOILER ALERT, if you don't already own these, you may want to just stop reading now so you can get the full effect if you decide to buy them later) - if you find that they aren't oriented the right direction, for example, they're oriented in the exact 180 degrees of the orientation you need them to be for your range, you can just peel off the top layer of the knob and BAM! there will be the same 1-10 knob but now 1 is 10 and 10 is 1.  It's like magic, except it's SCIENCE... or is it?  Ask a local wizard, or scientist, or both, and then make your own informed judgment.