Between series adapters provide hardware-based conversion from one type of common connector to another and may include special features such as backshells, insulation, dust and water seals, mounting flanges, and grounding leads. Adaptor end connector types include banana, binding post, F connector, DIN, BNC, circular, rectangular, D-sub, DVI MagSafe, phone jack and plugs, telephone, stereo, phono (RCA), ring, RJ45, SFP, snap, socket, spade, USB, terminal block, and XLR.