Dipole center insulators, about 4 inches long. The Silvertone antenna package came with one of these, two porcelain sideband style strains, and a Blue Flash arrester. Crosley made radios and is still around today. Powell Crosley founded the company in 1920 and also manufactured the Crosley automobile in the late 1930's. Soon after he started Crosley Motors Inc.. [id=210186677] to see the radio.