Manufacturer: Microplan   Model: Black Granite Gauge Stand Supports     Vacuum gauge stand support   Comprises a stand support with a vacuum base (88 dia x 27) and is manually moved by a cam and with a nimble arm. For details on the optional granite base see below.     Gauge stand support   Adjustable arm set and column made from stainless steel (20mm dia, H =220mm) with cursor and separate screw stops for the arm and column.     Gauge stand support with threaded column   Adjustable arm set with threaded column made from stainless steel (36mm dia, H= 330mm), includes cursor and separate screw stops for the arm and column.     Gauge stand support with micrometric adjustment   Comprises black granite base (300 x 200 x 50mm) with lapped grade 1, includes column (35mm dia, H= 300mm), steel slider and micrometric adjustment with parallel stroke to the column axis.     Granite bases for gauge stands   Two versions of granite base is available for the gauge stands, sizes 250 x 160 x 40mm and 300 x 200 x 50mm with the upper face lapped to grade 1 and slot for the column and rubber feet.