Up for sale here is this vintage rubber idler wheel with hardware from a Wollensak T-1515 portable reel-to-reel from the 1950s. This is in great shape with light wear. It's nice and soft, and will work great for you. Please see my pictures for details and measurements.

US shipping and handling is $5, and international is $18, no matter what quantity you buy. All of my small parts are set up for combined shipping--just use the "add to cart" feature and then check out at once, and the shipping will be automatically discounted. If you have any questions, please ask.

I have more reel-to-reel parts and other vintage electronics listed--feel free to take a look!