Camera Macro Adapter Ring Close-Up Adapter for Canon EF Lens / EF-S Lens

1. Material: ABS plastic + metal 2. Product specifications: 13mm, 21mm, 31mm 3. Scope of application: For Canon EF lens and EF-S lens 4. Similar to macro combination, which can be flexibly combined into different focal lengths 5. Built-in gold-plated electronic electric shock, with excellent metering and auto-focus functions