Fast Delivery: to Ukraine in 18 days. Macro rings are very light. Bayonet metal, plastic case. Fixed on the camera is not ideal, worse than the lens: after snapping in the bayonet remains a microscopic backlash about a millimeter, but only if you make an effort an effort The quality of contacts does not affect, the lens is "not lost". The rings are made very neatly. Everything is fine, thank you very much! Separately Thank you AliExpress for consolidating two of my orders from different sellers into one package, it is very convenient for me.