1 Gram Max Pocket Sized Beam Scale with .025 Gram Increments Its a balance scale in a box that fits in your pocket. Our traveling lab device is in a 4-5/8 x 1-7/8 x 7/8 deep black plastic box and can measure up to 1g in .025g increments or 5 carats by the same. Great for students, or for winning bets in your local pub on what a potato chip weighs.