The listing is for a single laundry liquid dispenser ball.
Used for dispersing the detergent directly into the wash cycle.
Each ball holds 52ml the same as the original manufacturers heavy load line, a half filled ball is the same as the light load line. I have added 2 thick lines around the ball to mark the levels.
These balls are designed to hold between 35 and 52ml of liquid detergent which are the recommended doses for a concentrated detergent such as Persil or Supermarket own brand.
if you are not using concentrated liquid then the dose would be bigger.
These balls hold the same VOLUME as a Persil dispenser they a are just slightly smaller in height because the persil ball has a cinched waste while a ball however has a more efficient shape so holds the same volume in a smaller shape.
These balls are 3d printed and use a significant amount of energy (hence the price) to produce but we use a 100% renewables supplier.
Please note the original persil ball, Liquid, the Pound coin and the tape measure are not included, These are just to show scale.
(yes I really do have to include this sort of obvious disclaimer for the educationally challenged)