This ball caster used for MiniQ robot is a white ABS housing, a 3/8" diameter metal ball, two spacers (1/16" and 1/8" thick), and two #2 screw sets. The total height of this ball caster is 0.4" with no spacers. You can also adjust the height by adding the spacers.The ball caster is used in our widely popular MiniQ sereis. Shipping List * Ball caster x1 * Screws x2 https://elecena.pl/product/22714451/ball-caster-metal-miniq-discontinued 2023-03-06 https://elecena.pl/product/22714451/ball-caster-metal-miniq-discontinued 2023-03-18 https://elecena.pl/product/22714451/ball-caster-metal-miniq-discontinued 2023-12-27 https://elecena.pl/product/22714451/ball-caster-metal-miniq-discontinued 2024-09-19