Soft, flexible, durable material makes Smart Block skid-resistant and helps absorb shock. Made for ultimate cow comfort and designed meticulously for optimal and accelerated healing. Glue-free heel support keeps hoof balanced while keeping glue from aggravating the soft spot of cow’s heel. Double-slope design achieves maximum lift on opposite claw. Available in left and right for optimal comfort and more secure fit. Can be used with any 2-part urethane glue. Measures 5.37"Lx2.2"Wx0.87"H.