Features: Different specifications nab hub adapter spacer for reel to reel tape recorders, easily meets your various needs. Elevates your cassette player experience with our latest rubber pads, designed for a perfectly fit, these pads provide a secure and comfortable grip. Made from durable rubber material, our pads offer excellent cushioning and prevent scratches on your device, they are built to last and ensure reliable usage. Reel adjustment disc, place the disc under the reel to compensates for warping or different thicknesses of reel, which is very convenient. Small size, light weight, easy to install and disassemble, and more user-friendly. Specifications: Material: Rubber Specification: 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm,1.0mm, 1.1mm, 1.2mm(optional) Diameter: Approx. 98mm/3.86inch Universal suitable for Reel to Reel Tape Recorders Note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution. Package includes: 1x Reel Adjusting Disc