KARCHER SG 4/4 Professional Steam CleanerKARCHER SG 4 4 Professional Steam Cleaner order no. 1. 092 282. 0 The SG 4 4 provides thorough, deep and hygienic cleaning without the use of detergents. With steam pressure of 4 bar and a 4 litre tank, the SG 4 4 is highly effective and productive. It is ideal for use in a variety of environments, where fast, hygienic cleaning is a necessity. The SG 4 4 is very simple to use, heats up quickly and can be used continuously thanks to its two tank