IC Biomedical Roller Base for HCL12, HC20, XT20, XTL8, TXT24 & LD25 Liquid Nitrogen SystemsIC Biomedical Roller Base for HCL12, HC20, XT20, XTL8, TXT24 & LD25 Liquid Nitrogen Systems The roller base is a sturdy, aluminum, 5 wheel dolly that enables movement of freezers and dewars easily and safely. Roller base comes with (2) locking and (3) non locking wheels Height: 3" Prior to ordering, please contact your local sales rep and provide your freezer model & serial number to confirm the part you are purchasing will fit your tank. Worthington