The DGB-4 is a blind diaphragm grommet used to seal and protect openings in panels. Manufactured from black TPE (RMS-262), it features precise dimensions for a secure fit, including a 12.7 mm 'A' dimension, 9.9 mm 'B' dimension, and 6.4 mm 'C' dimension. The blind design allows it to be used as a plug, which can then be pierced to accommodate wires or cables, offering a versatile solution for cable management and sealing applications.