【New, Unopened】 "Customize by swapping the two types of inner grips with different weights and materials." ★ "Dr. Grip CL Play Balance" is a mechanical pencil that can be customized to your preferred weight and center of gravity balance by combining and swapping the two included inner grips with different weights and materials. ★ By swapping the three silicone and metal inner grips, you can adjust the weight and center of gravity to suit your writing style. 【Lead Diameter】0.5mm 【Mechanism】Fure Fure & Knock Type 【Size】Maximum diameter φ14.2mm × Total length 142mm 【Replacement Eraser】HERF-10 【Barrel】Resin 【Grip】 ・Silicone rubber, Brass