pair of original and intact c. 1950's fully functional single electric light wall-mount "explosion proof" sconces designed and fabricated by the appleton electric company, chicago, il. the oversized unilets were savaged from a notable chicago foundry complex undergoing demolition. the matching sconces retains the original impact-resistant threaded end clear glass jars surrounded by detachable cages. the single porcelain or ceramic sockets are fully functional. the unilet socket housings contain multiple threaded openings for mounting with steel pipe in several various configurations. the threaded plugs used to seal off the unused openings remain intact. great overall condition. priced for the pair. measures 6 inches in diameter x 14 inches high.