ZPI Inertia Knob Silver Set of 2 This makes reeling much easier. I have kept these in storage without using them. The outer box is purple. I purchased these to use with Shimano reels. This is a new product, so returns, cancellations, and claims are not accepted after purchase. Also, this item has been handled by a person, so I handle it with care, but please refrain from purchasing if you are overly concerned about the condition.