5 ADJUSTABLE ANGLES WOODEN SLANT BOARD: Engineered for maximum effectiveness, adjustable to 5 angles: 23°, 30°, 35°, 40°, 45°. UPGRADE PREMIUM HARDWOODEN SLANT BOARD: This Physical Therapy Leg Exerciser Slant Board is made of 11 layers of AA-poplar wood core,this wedge board is crafted for superior strength and stability.
