Hi Sandra Chau Li,
It is possible to include casters on this workbench. To be able to add them, you'll need to change the depth of the cabinet for a 27"D instead of 21". You'll need also to add a cabinet base for casters (LB96-18), add a pair of Caster adaptor for the leg (WS21-0306) and choose the casters of your needs. We produce 4"H casters and 6"H ones. You can see them on page 132 in this link: https://p7010549.vo.llnwd.net/e2/media/pdfcatalog/pdf/80-188.1521633831.pdf
Regarding the monitor support, the part number is a RC59-03 for one screen and a RC59-04 for two screens.
Don't hesitate to contact us if you have more questions.
Answered by Ilona Vigneault | 2019-01-15 10:26:52