These sockets are designed to be used with Lux Mundi's liquid wax candle shells. Made in the USA of solid brass (3-1/2" is plated brass), these sockets are sold individually (not in pairs) in either a polished or satin brass finish and are available in the following sizes: 1-7/8", 2", 2-5/8", and 3-1/2". They are for cosmetic enhancement and not essential to the functionality of the candles.