5 x 6 Pack = Total 30 Discs. Fresh discs from Duck prevent stain buildup. Spreading around your toilet and rim, they create a barrier against buildup. Your toilet bowl will remain cleaner for longer. The discreet gel disc sits just under the rim. Simply use the dispenser to stamp a gel disc onto the inside of your toilet bowl. Just snap the barrel in and stamp a gel disc into the bowl. Every flush keeps your toilet continuously clean. Duck Fresh Discs prevents the buildup of limescale giving you a clean you can be sure of. One shot helps protect your family.