Packaging The markers shall be packaged in boxes such that the vertical wall will not take a permanent set in excess of 15 degrees from true vertical wall with respect to the base.	Marker Body and  Reflective Colors Type Y-2 -- Amber 2-Way Type Y-1 -- Amber 1-Way Type W-2 -- White 2-Way Type W-1 -- White 1-Way Additional colors are available by special order. Reflective Performance Reflective tape shall be affixed along the top of vertical section of the marker inside the I-beam on one or both sides. Reflective tapes shall be a cube-corner microprism material with the following: Initial Brightness Color Grade SI CIL Yellow WZ 2.5 230 White WZ 3.5 320 Specific Intensity or Coefficient of Luminous Intensity at 0.2 observation angle and -4.0 entrance angle (in cd/ftc or mcd/lux)	Marker Body The marker body shall be made from .060" thick polyurethane which meets the following material:   Property Results ASTM Test Method Specific Gravity (min) 1.19 D792 Hardness (min) 80A D2240 Tensile Strength (min psi) 4600 D412 Ultimate Elongation (min %) 330 D412 Modulus @ 300% (min psi) 1000 D412 Stiffness @-20ºF (min psi) @-72ºF (min psi) 1700 900 D1053 D1053 Compression Set 22 hr @ 70ºC max% 65 D396 Tabor Abrasion CS17 wheel wt. loss mg/100 cycles 3   Adhesive The adhesive, factory-applied to the marker base, shall be a solid butyl rubber 0.125" (32 mm) thick, minimum 0.75" (19.0 mm) wide on 1.0" (25.4 mm) wide release paper.