Product review (3 stars): Don't fall into this trap! ;(
Here's what I really dislike about these: two traps, only one tie. How expensive can it be to include a second tie? When you reuse the tie, you can't get the second trap on securely -- and it often falls off, so you have to replace it prematurely. I've used pipe ties (similar to what discount stores use to put pairs of shoes together) for the second trap -- but going forward, it's easier to buy a brand that supplies a tie for each trap.