I have for sale a Bright Star Air Mass platform that is black graniteand measures 19.5"x17". I bought it used, I wanted to see if it offered any benefits to my system when used in conjunction with a Symposium Ultra platform. I'm not exactly sure how old it is, but it is one of the older models that has the fill tube in the back. I also am not sure of the actual weight capacity, but it seemed OK with about 50lbs. on top of it I paid $75 + shipping for it, which is what I am asking for it. I can accept money order or Paypal and buyer pays actual shipping charges. You can either PM me or e-mail me at firstname.lastname@example.org . Thank you.