Lot of 3 metal reels with studio master tape as far as I can see. See all pictures closely. 3 are with sleeve. All high quality studio tape and look as new, but may be used. Not tested Carefully shipped Electromagnetic Properties Recommended Bias Setting: 3.0 dB *1 Sensitivity at 1 kHz: +2.0 dB *2 Sensitivity at 10 kHz: +4.0 dB *2 Third Harmonic Distortion at: Reference Level (1 kHz): 0.1% *3 Output Level at 30/, Third Harmonic Distortion (1 kHz): +12.3 dB *4 Weighted Signal-to-Noise Ratio: a. related to reference level: 64.3 dB *5 b. related to output level at 3% third: Harmonic distortion: 76.6dB *5 Modulation Noise Ratio: 76.0 dB *6 lntermodulation Distortion: 1.0% *7 Print-through: 55.0 dB *8 Magnetic Properties Coercivfty: 330 Oe *9 Retentivity: 1460 Gs *9 Physical Properties Thickness: Oxide Coating 0.55 mils *10 Base: 1.42 mils *10 Backcoating: 0.05 mils *10 Total: 2.02 mils *10 Standard Widths 1/4 in.: 0.246" 1/2 in.: 0.496" 1 in.: 0.997" 2 in.: 1.996" Width Tolerance 4 in.: ±0.001" 1/2, 1, 2 in.: +0.002" Yield Strength: 5.7 (lbs./qtr. in.) *11 Breaking Strength: 11.2 (lbs./qtr. in.) *12 Measuring Conditions Tape Speed: 15 n./sec Reference Level: 260 nWb/m Record Head: Gap Length: 0.25 mils Track Width: 70 mils Reproduce Head: Gap Length: 0.25 mils Track Width: 70 mils Reproduce Equalization: 50 + 3180 Ps Note: not tested