Ecoballs® the original. Only buy Ecoballs that displays the ® for registered or ™ for trademark . Ecoballs® are manufactured under licence for Ecozone (UK) Ltd. Ecoballs® refill pellets for Ecoballs 1000 last up to 750 washes. If you have Ecoballs 150 then you need to purchase refills 180. 270 grams of Ecoballs® refills that can refill Ecoballs® or can just be used to top up your Ecoballs® when required. Instructions: Firstly, to use these refills you must have a set of 3 Ecoballs 1000®. These refills must not be used on their own without the Ecoballs® . Open the Ecoballs® units by first removing the sponge ring and the screw from the centre of the unit, you can then unscrew the two halves of the Ecoballs® units. If the unit is difficult to open tap the rim of the unit against a hard surface and try again. Make sure that the units are tightly put back together after you have refilled them. Ecoballs® are a protected product, manufactured under license for Ecozone (UK) Ltd. “Ecoballs” and the logo are a registered trademark owned by Ecozone (UK) Ltd. Do be careful of other types of laundry balls that may contain cheap ingredients such as SLS (sodium lauyrl/laureth sulphate) that can cause allergic skin reactions.