Pack contents: 20 rubber drive belts, mixed sizes with folded lengths from 35 mm to 65 mm. Supplied as a set so you have multiple size options for repairs and maintenance. Ease of installation: simple to fit — most belts can be replaced by hand or with basic tools. The mixed-size pack reduces time spent searching for the correct belt. Function and compatibility: designed for cassette recorders and similar tape players that use drive belts in the 35–65 mm folded-length range. The variety of sizes increases the chance of a direct fit across many models and vintage devices. Material and durability: made from good-quality rubber that offers strong wear resistance and resists permanent deformation. These belts maintain traction and shape for reliable, consistent performance. What’s included: only the rubber belts are supplied. Any other fixtures, housings, or demonstration parts shown in product images are not included. Practical use scenarios: 1) Restore playback on a worn vintage cassette recorder by replacing brittle or slipping belts to recover tape transport speed and sound quality. 2) Maintain home stereo cassette decks and portable tape players by keeping spare belts on hand for quick on-site repairs. 3) Support hobby electronics and DIY projects where a range of small drive belts is needed for prototypes or restorations. Benefits at a glance: Saves time with a 20-piece mixed-size kit. Improves device reliability by replacing aged, stretched, or hardened belts. Durable rubber construction reduces the need for frequent replacements. Note: Check the folded length range (35–65 mm) against your device’s belt size requirement to ensure compatibility before installation.