Take A Range Check 5˙ Finger Goniometer 6 Standard Hip Knee Post Surgical Prdct 5 diameter faceplate * The stretchable sides so you 5 diameter faceplate * The QuickConnect Transducer Cable System is optional with the standard soundhead *It is provided with the small soundhead or the dual standard small soundhead on all Amrex ultrasound equipment * Compessed Foam * Plaid 17 6 Standard 140 degree * Measures the range of motion of metacarpal phalangeal and interphalangeal joints * Head has two opposing scales marked in 5 degree increments * Features a linear scale in both inches and centimeters on arm * Deluxe model features a larger protractor head and full 180 degree scale for more accurate readings