Mcoplus MK-N-AF3-B Auto Macro Focus AF Extension Tube Ring Set Adapter for Nikon 1 Mount Lens Camera J1 J2 J3 V1 V2 Material:Plastic Tube Lengths: (1) 10mm.(2) 16mm. Compatible with:For Nikon 1 mount cameras (e.g. J1,V1) Not suitable for Nikon F mount digital/film SLR camera It have three kinds of combinations, support three kinds of magnifications.