TDK SA tape uses an ultrafine Super Avilyn Type II high bias Cobalt formulation with high density packing and uniform orientation. TDK SA tape provides superb music reproduction. Its exceptionally high resolution, superior dynamic range and very low noise makes it ideal for taping from a wide variety of music sources, including CD's. TDK SA tape employs the advanced AR-RC III mechanism for superior rigidity and reduced modulation noise, and is especially recommended for use in home component systems, high performance portables and car stereos. Cost per unit $3.71 By clicking the order button below you will be able to specify quantity. Availability: Usually ships the next business day. TDKSA90 90 Minute Audio Cassettes High-Bias Type II TDKSA90$3.71 For more info.E-mail us at: TapeCenter@Gmail.com