FOR SALE: AIRDUX COIL #1616T - new old stock This air core coil is 2" Diameter and about 8.5 inches in length. 16 turns per inch. So it has about 132 turns. Looks like #16 or #18 tinned copper wire typical of these coils. New with the original box. Available for $14.00 plus shipping. 73 - Bry, AF4K