Peter Kuliss produces a high quality therapeutic product. I have used his products in my therapeutic work and find his instructions helpful and simple for clients to adopt. The red and green plastic coating make the polarity clear and makes the magnets safe form chipping also easier to separate. The pull strength is reduced by the thickness or the plastic but that dose not reduce the depth of penetration significantly.
Because I do a lot of therapy I tend to make my own kits specific for my clients needs. I share my ideas at magnet-therapy-how-why.com
I have only found a few companies that are producing effective magnet therapy products and BioMagScience is one of them.