21329 Adapter on October 31, 2015 | Marketing Team 21329 Adapter - black For speaker-satellite systems. The short 250 mm adapter is perfectly suited as a single rod or as an extension rod. The adapter with a tube diameter of 35 mm has a M20 male threaded bolt on the one end and a M20 female thread on the other end. With the adapter the rod can be expanded to any length. EAN: 4016842826797 Height: 250 mm Tube end(s): threaded bush M20, threaded bolt M20 Type: black Weight: 0.61 kg