RPM Model 35 Marker Body The body of the marker shall be solid with no hollow areas and constructed of an impact-resistant thermoplastic alloy that conforms to the following properties:   Property Results Units ASTM Test Method Specific Gravity (min) 1.19 D792 Hardness Rockwell M (min) 20 D785 Gardner Impact Strength (2" dia. x .125" sample) 120 in-lb N/A Tensile Strength @ Yield 2,500 lbf/sq. in. D638 Flexural Strength 5,500 lbf/sq. in. D790 Flexural Modulus 275,000 D790	Halftrack Model 26 Marker Base The base of the marker shall be solid, with no hollows, and have grooves that constitute a minimum of 75% of the base area that increase the bonding surface by a minimum of 25%. Marker Body and Reflective Colors Type Y-2 Yellow 2-Way Type Y-1 Yellow 1-Way Type W-2 White 2-Way Type W-1 White 1-Way Additional colors are available by special order.	Halftrack Model 25 Reflective Performance Reflective tape shall be affixed along the front and/or rear faces of the marker. The tape shall be a cube-corner microprism retroreflective material with the following minimum optical performance. Initial Brightness Marker Model# Color SI CIL RPM 35 White 3.5 320 RPM 35 Yellow 2.5 220 Halftrack 25, 26 White 3.5 320 Halftrack 25, 26 Yellow 2.5 220   *Typical Initial Specific Intensity or Coefficient of Luminous Intensity at 0.2 obs angle and -4.0 entrance angle (in cd/ftc or mcd/lux)