Baseline Goniometer 12 360d Plastic Flexibility Rotation Testers Designed to promote proper posture 48750 Designed to promote proper posture and good body mechanics to help maintain a healthy back * Can be used while lifting pushing pulling walking exercising and repetitive bending or twisting * The ObusForme Back Belt comes in four sizes specifically tailored to the shape of the male physique * Size Lg XLg fits waist circum * Grip to top of Cuff: 6 Clear transparent plastic permits observation of joint s axis of motion and its range of motion * The 360¯ head has three scales calibrated to be used with the ISOM (International Standards of Measurement STFR) system * One arm has a linear scale in inches and centimeters * Scale reads 1¯ increments