Pololu

This ball caster uses a 3/4″ diameter metal ball. The height of the assembled kit ranges from 0.8″ to 1.1″, depending on the combination of include...

This ball caster uses a 1″ diameter plastic ball and has an overall height of 1.1″ (29 mm). The two-part housing snaps together to securely enclos...

This light ball caster uses a 1″ diameter plastic ball. The height of the assembled kit ranges from 1.1″ to 1.4″, depending on the combination of i...

This ball caster uses a 1″ diameter plastic ball and has an overall height of 1.1″ (29 mm). The two-part housing snaps together to securely enclos...

This light ball caster uses a 3/4″ diameter plastic ball. The height of the assembled kit ranges from 0.9″ to 1.2″, depending on the combination of...

This ball caster uses a 1/2″ diameter metal ball. The height of the assembled kit ranges from 0.5″ to 0.8″, depending on the combination of include...

This light ball caster uses a 1/2″ diameter plastic ball. The height of the assembled kit ranges from 0.5″ to 0.8″, depending on the combination of...

This small ball caster uses a 3/8″ diameter metal ball. The height of the assembled kit ranges from 0.4″ to 0.6″, depending on the combination of i...

This small, light ball caster uses a 3/8″ diameter plastic ball. The height of the assembled kit ranges from 0.4″ to 0.6″, depending on the combina...

This ball caster was originally released as a replacement part for the 3pi robot, but the 1/2″ ball can also be used a replacement part for the new...