Medium strength, For fine threaded fittings (up to 3/4 BSP). Used in hydraulic and pneumatic installations. Drinking water WRAS approved. Features: - Instant low-pressure seal. - Resistant to fuel, oil, coolants and hydraulic fluids. - Locks connection against vibration loosening. Maximum pipe size: 3/4". Comment: for small fine threaded metal fittings, especially hydraulic fittings.