3M 17319, Versaflo Replacement Head Suspension M-350, for use with M-300 and M-400 Hardhats, 7000127679, 1 EA/Case 
3M 33443, Cubitron II File Belt, 36+, 1/2 in x 18 in (12.7 mm x 457.2 mm), 7100033184, 10 belts per carton, 5 cartons per case 
Insize ISL-A1-550, LINEAR SCALE, 22″/550mm, 6928640321788
$449.22
Resolution .00005″.
Max. response speed 164ft/min.
Scale grating pitch 787_in.
Scale reference point pitch 1.97″.
Accuracy: ?(197+5L)_in, L is the effective length in inch.
Cable length: 140″ (L: 2-38″), 200″ (L: 40-60″), 400″ (L: 64-128″).
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