Ph indicator strips Non-bleeding .br ph 4.0-7.0 special indicator ph 4.0 - 4.4 - 4.7 - 5.0 - 5.3 - 5.5 - 5.8 - 6.1 - 6.5 - 7.0. non-CE marked product: not for in-vitro use VWR INTERNATIONAL VWR