File:S3 - alu spacer .5in OD x .319in ID x 10mm.jpg

Shapeoko 3 - Aluminum Spacer - 6 pieces

Imperial: 1/2″ outer diameter (OD) x .319″ inner diameter (ID) x 0.39″ long

Metric: 12.7mm outer diameter (OD) x 8.1mm inner diameter (ID) x 10mm long