Housing plastic.
Ball bearing stainless steel 1.4112.
Plain bearing insert POM.
Bushes and grease nipple stainless steel 1.4301.
Version
Plain bearing insert white.
Housing green.
Stainless steel parts bright.
Note
The housings are very robust, hard wearing and shock proof. They are resistant to most alkaline solutions, weak acids (PH 49) and brines. In contrast to cast or steel housings the special plastic in these housings prevent the formation of microorganisms.
Drawing reference
1) ball bearing
2) plain bearing