The AES Single-turn Round Coil The single turn round coil is suitable for soldering or heating tubes/cylindrical parts. The coils range in sizes with inner diameter from 22 mm to 82 mm. 22mm Single Turn Round Coil compatible with AES HI 10, AES HI 10F, AES HI 10C, AES HI 8F, AES HI 8C 28mm Single Turn Round Coil compatible with AES HI 10, AES HI 10F, AES HI 10C, AES HI 8F, AES HI 8C 34mm Single Turn Round Coil compatible with AES HI 10, AES HI 10F, AES HI 10C, AES HI 8F, AES HI 8C 40mm Single Turn Round Coil compatible with AES HI 10, AES HI 10F, AES HI 10C, AES HI 8F, AES HI 8C 47mm Single Turn Round Coil compatible with AES HI 10, AES HI 10F, AES HI 10C, AES HI 8F, AES HI 8C 57mm Single Turn Round Coil compatible with AES HI 10, AES HI 10F, AES HI 10C, AES HI 8F, AES HI 8C 67mm Single Turn Round Coil compatible with AES HI 10C, AES HI 8F, AES HI 8C 82mm Single Turn Round Coil compatible with AES HI 8C