Brand new, unopened! This is a set of 4. The filter bodies are protected in bags, so there is no deterioration. The outer bags have some scratches and dirt. Please be aware of this (´;ω;｀) *Regarding the product image with the blue speech bubble, we are using an image from the internet. [Contents] ・CP-50 Filter x 2 ・α Filter x 2 This is a set of two types of filters compatible with the germanium bath units "Germa-kun" and "Therapy 21"! There are two types, CP-50 and α, each with its own characteristics, so please check the explanation below. ※Differences from the 【CP-50】 filter※ "Why are bubbles forming in the hot water even though I replaced the filter with a new one?" This filter has been improved based on this feedback. The 【α filter】 is designed to solve the problem of the finishing adhesive dissolving in the hot water and causing bubbles. Compatible models are "Germa-kun" and "Therapy 21", just like the 【CP-50】. Germanium bath units perform filtration using only this filter. If you don't replace it often, the circulating water in the bath unit will become cloudy and develop an odor more quickly. Also, dirt such as grease will accumulate on the bath unit itself, putting a strain on the machine. Although it varies depending on the turnover rate of customers using the bath, please replace it frequently. ※Shipped via Sagawa Express (tracking available) ※Customers residing in Hokkaido, Okinawa, and remote islands will be charged a separate shipping fee. ※Shipping arrangements cannot be made on Saturdays, Sundays, and holidays.