Probably concrete mix under the base fabric that will ensure that these candlestick holders will not tip over. Not signed or marked but I have not taken the base cloth off and don't want to. No markings but appear to be Silver Plate with lots of tarnish.
Candlestick area would be for a taper style candle. See my other candle holders - there may be a dutch basket that matches or is similar in dutch style these candlestick holders. The item "Antique Candlestick Holders Dutch Repousse Silver Plate 17.25 Tall Set of 2" is in sale since Monday, November 26, 2018. This item is in the category "Antiques\Silver\Silverplate\Candlesticks & Candelabra".
The seller is "keywestboardwalkvintage" and is located in Atlantic City, New Jersey. This item can be shipped to United States.