ALL SIZES AVAILABLE: Gear ring sizes cover all lens models. Unique materials guarantee flexibility and durability, Accurate facus and no skipping. silent action and smooth operation. 360° SEAMLESS ROTATION: Protect your lens reduce lens gear abrasion 360 degree seamless rotation no resistance-smooth focusing action 0.8 MOD STANDARDIZED GEAR: Fully closed gear ring, evenly distributed pressure, durable&firm attachment with zero drifting,prevents lens damage. PERFECT MATCH: With metallic and plastic follow focus gears, Flexible yet rugged, scratch resistant. DIVIDE ONE INTO TWO: Easy to cut design, multi-purpose, flexible application, fits different lens focus gear widths. Please verify your camera's lens thread size before ordering.