• W21-40-7 BASL | W21407BASL• Inner dimension: 21, Outer dimension: 40, Width: 7, Weight: 0,01, Pressure resistance: Up to 0.5 bar max., Dust lip/Protective lip: With, Material: NBR (Perbunan), Temperature range: -30 to +100 °C, Tension spring: Non-alloy steel, Version: Rubber coating