Block for Visible, 12 x 22mm, depth 50mm, round Back Catalog number: MU22-00-0881 Availability: In the manufacturer's stock Price on request - + Recommended C-325SUN 325 Field Station Sun Shield Price on request R2020-E Roto-Mini™ Rotator with tube holders, 230V Price on request Z326-15-A5 Adapter pack for 5ml tubes in Z207-A rotors, 2/pk. Price on request