Features: brand new and high quality Material: High-quality aluminum+ABS plastic material, durable and wear-resistant. Rotation: Rotatable, can be used together with the handle. Application: Suitable for locking optical disks and fixing tapes. Applicability: Suitable for Student ReVox open disk recorder. Size: The size of aluminum cup is 75x54mm. Specifications: Item Type: Adapter Model Number: Recorder Opener Name: 10 inch opener Material: Aluminum alloy + plastic Base: White, Black(optional) Color: Black, Red, Gold, Blue, Green, Silver, Purple (optional) Applicable to: For Studer ReVox Package Includes: 1Pair x Disc Opener with ABS Base note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement.