Chrome plating on potmetal base (aluminum/Zinc) the vertical window guide is stainless, the lower vent channel is potmetal, as are the locking handles,...be prepared for sicker shock to have them chromed, the set for my 70 Charger costs $600 for the pair, and they were in very good shape with minimal pits, the more pits, the higher the price, as it's all hand work to fill the pits individually before plating,...Mike Ross at BEAParts.com is test fitting some reproduction B bodie vent window chrome A frames currently, might want to check with him regarding price/application/time frame for availability
mike