See the chart below describing the differences between the 316 plates and 304/321 plates.
|316 vs 304/321|
|Avg # of sessions per set*||30-40||30-40|
|Avg cost per session||$2.00||$2.71|
|Recommended session length||30 min||20 min|
|Overall session result||Same||Same|
*Because of varying water qualities, there is no guarantee on the number of sessions per set plates you will receive.
Watch a brief demonstration on how to change your plates.