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. Your camera's lens thread size will be marked somewhere on the lens barrel or printed underneath your lens cap.