MEIKE MK-N-AF1-B Auto Focus Macro Extension Tube Set for Nikon DSLR Camera 10MM 20MM 36MM D80 D90 D300 D300SD800 D3100 D3200 D3400 D5000 D51000 D5200 D7000 D7100 etc?Plastic bayonet?

Description This is used by attaching between canera body and lens of the 35mm single-lens reflex camera,it comes as a set of 3 tubes of different lengths which singly or in combination makes it useable in 7 different lengths,it couples perfectly...