Catalogue entry no. 514a by Max Loehr:
514 Pair of Cylindrical Tubes
Greenish white jade with sparse, light brown and gray markings. The two pieces match perfectly in dimensions and workmanship. Their drill-holes appear to be straight and are well centered. Both are decorated with a pattern of incised, interlocked C -spirals; there are plain margins at either end. Late Eastern Chou or early Han.