FULL COMPATIBILITY: Universal cartridge Standard Size 2.7x 2.4 in , our shower filter is easy to be installed in any home. Shower filter uses a standard 1/2" thread type and Compatible with wall-mounted, handheld, rainfall and combo shower heads for versatile home use. SOFT AND SMOOTH YOUR SKIN: With this show filter your skin feels soft and moisturized. Your skin is no more dry, irritated, itchy skin: helps with skin issues, sensitivity and allergies and keep eczema from flaring up. Our skin is our largest organ and absorbs whatever we put on it. Use this water filter to protect you from the toxins in the water is priceless. SOFT AND SMOOTH YOUR HAIR: No harsh chemicals sneaking in to damage hair! With this filter hair is back to normal. Keeping blonde color bright and preventing brassy tones. Stopped significant hair loss and hair color from turning brassy. A life saver for my hair and skin especially. EASY TO INSTALL: No tools, just hand-tighten. Change the cartridge every 4~6 months once the water pressure gets low.