Descriptions:This is a strong flexible rule which can be bent into many shapes.,Exceptionally flexible,will not discolor or decompose with age.Ideal for use in: drafting, engineering, construction, surveying, dress making, craft and a multitude of other uses.Features:This is a strong flexible rule which can be bent into many shapes.Exceptionally flexible, it is made of vinylthat will not discolor or decompose with age.Can be arbitrarily shaped,will not rebound, and double sides can be used.Raised edges designed for ink ruling, and easily fitting on a drawing board.It is applicable to arc measurement, which is used to bend to the radian and measure contour lines. Ideal for use in: drafting, engineering, construction, surveying, dress making, craft and a multitude of other uses.Specifications:Material: PlasticFront side(Optional):30cm/60cmBack side:12inch/24inchWeight:83g,146gPackage Included:1 x Flexible Curve Ruler