Usage Tips:PREMIUM CARE: Shower filters to effectively reduces chlorine, heavy metals, fluoride, lime and scale in water. Your will enjoy deserves fresh, chemical-free, odorless water. WATER FILTER: filter help restore balance in oil glands.Our shower head filter with 15 stages of maximum water filtration makes skin softer, nails stronger and hair shinier WATER PURIFIER: Reduce the chance of clogged shower head. We suggest you change the filter every 3 moths (~ 8000 gallons), epending on water quality and frequency of use. EASY REPLACEMENT - No tools required for replacing. Just open the housing of the shower cartridge filter, take out old and replace with one. Size:About 8cm long Material:plastic Colour:White & Blue Package Contents: 20 x Shower Head Filter / 12 x Shower Head Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.