3M DH640 In-Line Document Holder Hahnem�hle 10 647 100 The Sensei 72-55mm Step-Down Ring

The Sensei 72-55mm Step-Down Ring is a step-down ring permitting the use of 55mm threaded filters on a 72mm threaded lens

To insure design integrity the patterns are etched using a precise double-sided process on stainless steel

Made from a water-resistant polypropylene

Mini-USB for firmware updates Power 2 x AAA batteries Battery Life Not specified by manufacturer Indicators and Controls LCD screen display:

solid-steel chassis is built to a high industrial standard with an overhang to protect the connectors and main level control from glancing blows

3M DH640 In-Line Document Holder Hahnem�hle 10 647 100 The Sensei 72-55mm Step-Down RingWeighted Base 18" Wide Backplate The DH640 In Line Document Holder from 3M positions directly between monitor and keyboard. It has a weighted base that allows the ledge to dip below the desk edge. It has an elastic line guide that marks your place and keeps pages open. The 18" wide backplate supports books, catalogs, and just about any size document. Its angle and height can be adjusted. By keeping documents positioned as close to your computer