SOLD Up for sale is an unused Chrome KISS Cart. I bought the wrong one and this never got used. It is the one for the OPHOS Pen. If you want to use it with a Persei/Omicron I believe you need the adapter. This cart resembles ego threading, but will not fit on a standard ego battery. It has been opened but it has not been used. I'd like to get $20. That includes USPS shipping and Paypal fees.