Features: This metal recording tape is craft from quality material and can provide clear and better sound effects. Can record for 40minutes, you can use it to record voice, music, and other sounds that need to be recorded to meet your recording needs. The blank Cassettes tape adopts 3-hole diamond shape designing, which is practical, and with long service life. Convenient to carry, small in size, light in weight, and convenient to carry, whether for business travel, and daily outings, you can carry and record anywhere. Widely compatibility and suitable for most recording devices and player. Specifications: Material: Metal Color: refer to pictures to select please Size: about 11x7cm/4.33x2.76inch Package Includes: 1x Reel to Reel Cassettes Tape(Empty) note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.