Check the listing for details. Litz wire 40/42 for Amateur & Crystal Radio coil, Single layer insulation, 200'. Condition: New. Listed at 22.00 USD. Normal 0 false false false EN-US ZH-CN X-NONE MicrosoftInternetExplorer4 Here are the litz wire currently in stock and their recommended operating frequency: Strands AWG Size -- Recommended Operating Frequency Number of Strands / Strands AWG size AWG 48 (0.03 mm) -- 1.4 MHZ to 2.8 MHZ: 180/48, 300/48, 420/48, 675/48, 1100/48, 1725/48 AWG 46 (0.04 mm) -- 850 KHZ to 1.4 MHZ: 10/46, 20/46, 30/46, 40/46, 60/46, 66/46, 100/46, 175/46, 270/46, 330/46, 420/46, 660/46, 924/46, 1050/46, 1162/46 AWG 44 (0.05 mm) -- 350 KHZ to 850 KHZ: 10/44, 20/44, 30/44, 40/44, 60/44, 100/44, 125/44, 160/44, 255/44, 405/44, 650/44, 1050/44 AWG 42 (0.06 mm) -- 200 KHZ to 350 KHZ: 16/42, 26/42, 40/42, 66/42, 105/42, 165/42, 270/42, 420/42, 660/42, 1050/42 AWG 40 (0.08 mm) -- 100 KHZ to 200 KHZ: 17/40, 27/40, 42/40, 66/40, 105/40, 108/40, 170/40, 270/40, 435/40, 700/40, 1100/40 AWG 38 (0.10 mm) -- 50 KHZ to 100 KHZ: 16/38, 25/38, 40/38, 66/38, 100/38, 162/38, 200/38, 260/38, 280/38, 420/38, 660/38, 1050/38, 1650/38 AWG 36 (0.13 mm) -- 20 KHZ to 50 KHZ: 16/36, 27/36, 41/36, 65/36, 105/36, 165/36, 265/36, 420/36 AWG 33 (0.18 mm) -- 10 KHZ to 20 KHZ: 13/33, 21/33, 32/33, 53/33, 82/33, 100/33, 150/33, 210/33, 329/33 AWG 30 (0.25 mm) -- 1 KHZ to 10 KHZ: 7/30, 11/30, 17/30, 26/30, 42/30, 65/30, 110/30 AWG 28 (0.31 mm) -- 60 HZ to 1 KHZ: 5/28, 7/28, 10/28, 18/28, 27/28, 42/28, 66/28 Please E-mail any questions you may have before you bid. Fast shipping! Usually mail on next working day, but if I can get ready before the Post Office close, the package will mail in same day when you order.