Has 4 interior glass supports, or ribs running from outer peticoat to outer skirt. As seen from bpttom of base, there are 3 clamshell shaped chips on the inside of the skirt These total about 4 inches long, as measured along the outside of the skirt. SeePhoto., Price includeshShipping. In Continenental US. $450. Tracking number provided once shipped. Will double box to protect this beauty. Jim White, PayPal toIndyblanc @ AOL. Com317-319-1205 Longtime NIA Member