Oil level sight glasses 148 are practically indestructible. Even at high torque there is no danger of any breakage.
Oil level sight glasses 148 can also be used in tanks which are pressurised. The max permissible pressure is dependent on the temperature.

Specification of the plastic:
•Crystal-clear Polyamid (PA 6-T)
•ageing resistant
•high mechanical strength, but not suitable for alcohol
•temperature resistant up to 100 °C
•solvent resistant, but not suitable for alcohol

Sealing ring: rubber NBR (Perbunan)
Contrast screen: Aluminium anodized, natural colour