... 30,40,50, and 60 parts to the inch,WITH REVISED scale ITEM NO. SPECSQTY/PCS MEAS(CM)793030cm triangel ... pvc box pack20038*37*37993030cm triangel scale ruler(1:20)20038*37*37923030cm triangel scale ruler(1:10)20038*37*37943030cm ... :4000,1:5000, 1:6000.usd0.65PCS6.BD4930 ,Bi-scale 1:10;100, 1:15:150,1:20:200,1 ... 30,30,40,50, and 60 parts to the inch,WITH REVISED usd0.70pcspacking; : 1pcs/pvc BOX 200 PCS/CTN, ...