3M 918, Disc Pad Holder, 8 in x 5/16 in x 3/8 in 5/8-11 Internal, 7000120891 
3M 13085, Wetordry Cloth Disc 281W, 8 in x NH, P, 7000045611 
Insize ISF-S5000-U, DIGITAL SPRING TESTERS, 1124lbf, 6940561961393
$5,689.25
Resolution .1lbf
Range of digital scale 5.9″
Resolution of digital scale .0005″
Disk diameter 4.2″ DIA
Measuring range of force 5%~100% (maximum load)
Peak hold and automatic release function
Set upper and lower limits, red and green indicator and buzzer alarm
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Insize ISF-S1000-U, DIGITAL SPRING TESTERS, 224lbf, 6940561961379
$4,715.38