If you're trying your hand at making a rollergun, you might have found that it's not easy getting exactly the roller you want. Sailboat rollers work, but often aren't available in the right size. Custom rollers often go for $20 or more apiece. I've had several requests lately, so I've started making some for other than my own guns. I will make a custom set of 2 delrin rollers to your specs, 2" or less in diameter, for $25 plus $8 flat rate shipping anywhere in the US. No additional shipping charge for more than one set as long as they fit in the flat rate box.
Shown below are sets of 1" and 1-1/4" rollers.
Bill