Neewer Metal AF Auto-Focus Macro Extension Tube Set 10mm&16mm for Sony NEX E-Mount Camera NEX 3/3N/5/5N/5R/A6000/A6300 and Full Frame A7 A7S/A7SII A7R/A7RII A7II 2 Piece Extension Tube Set for MK-S-AF3A, made of metal. Compatible with Sony NEX, E-mount series Micro DSLR. Support Exact TTL Exposure and Auto-focus;Built-in Electronic Pins and internal driver. New adapter aperture hole design, perfectly support Sony full-frame camera A7/A7R/A7S/A7 II. Including two tubes(10mm, 16mm), 3 different combinations.