There is a trivial difference in the illustration of the product and what was actually received, this in no way is a problem. In fact, the product received is a better design.
PROS: Easy to use. Durable.
CONS: None about the product, however the inventory control label affixed by Amazon obscured the instructions.
AFTERTHOUGHTS:
A much less expensive method to the same end as the products- Using a standard Mason jar lid ring and a patch of nylon fabric. Overlapping the jar opening with the fabric and screw on a Mason jar ring. Same result, much less expensive.