From Amazon
Domestos Power 5 Pink Magnolia toilet blocks that clean at full power for up to 300 flushes Toilet Rim Block up to 3x more limescale prevention* 55 g
Vitapoint Health & Beauty
Domestos Power 5 Toilet Rim Block Pink Magnolia 55g
The Range
Domestos Power 5 Pink Magnolia Toilet Rim Block for Upto 300 Flushes, 55g - Buy 6 / 1800 Flushes