Brass Scales Captive Weight PAIRUnless specified, items are sold individually (as single pieces)and are externally threaded. Material : Brass CBR with Rubber Bead Gauge at Wear Area : Choose from 2G, 0G or 00G Inside Length : 2G is 10mm inside length. 0G is 15mm inside length. 00G is 16mm inside length. Ball Size : All sizes have an 8mm rubber ball. Weight Per Piece : 2G is 7grams. 0G is 13grams, 00g is 26grams. Price increases with size. Sold as a PAIR (2 Pieces)