Gulick Spring with Tape Measure Incline Boards Includes four units with fixed Style:Left Ear Includes four units with fixed incline: 1 each at 30 degree 25 degree 20 degree and 15 degree * Non skid threads * Natural finish * 16 Deep x 15 Wide each * The lightweight heavy duty aluminum means you don't have to worry about maintenance and ensures the Gateway Solid Surface Portable Ramp can be used in even the harshest of weather conditions * The lightweight heavy duty aluminum is more durable than wood allowing you to repeatedly use the ramp every day without worrying about deterioration * The one piece design of the Gateway Solid Surface Portable Ramp means no assembly is required * All you have to do is set it in place and it's ready for use * Slip resistant surface * Designed with a permanent extruded slip resistant surface the Gateway Solid Surface Portable Ramp makes sure that wheels don't lose traction removing the worry of wheels slipping on the ramp * Useable size: 10'x36 x3 6 Feet Long * Spring weighted end applies force to the tape measure assuring accurate reproducible results * Phthalate free * Used for growth dietary and edema evaluations * Red mark and notch on the Gulick end when pulled *