Ultimate Support MS-90/45B Professional Column Studio Monitor Stand - 45"/Black Ultimate Monitor Stand The MS Series studio reference monitor stands from Ultimate Support offer unparalleled innovation and strength for professional, project, and home studios alike. The MS-90/45 is a 45" tall monitor stand solution that provides surface decoupling via top mounted rubber decoupling pads and spiked, rubber covered feet. Three internal channels provide the option to pass cables through the base of the stand, while a larger internal channel allows you to add shot or sand for additional absorption and weight. The MS-90/45 is available in Red (MS-90/45R) and Black (MS-90/45B.)The newest Revision A models of the MS-90/45 and MS-90/36 allow users to expand their stands by adding MS-80B Desktop Monitor Stands (Revision A). This allows users to expand the capabilities of their MS series stands to offer a wider range of positioning via vertical angle adjustment. Additionally, Revision A MS Series stands include a sunken groove in the top mounted monitor positioning holes which makes it easier to adjust the angle of their speakers and find the perfect sweet spot.The Revision A versions of MS series stands can be clearly identified by their new blue and white packaging- so if you are purchasing in store or online, be sure and verify with your retailer that you are buying Revision A models.