LEGO components meet stringent industry standards to ensure they are consistent, compatible and form a secure connection every time - its been that way since 1958. LEGO components are dropped, heated, crushed, twisted and analysed to make sure they meet stringent global safety ...LEGO components meet stringent industry standards to ensure they are consistent, compatible and form a secure connection every time - its been that way since 1958. LEGO components are dropped, heated, crushed, twisted and analysed to make sure they meet stringent global safety standards.PROP 65 WARNING: This product can expose you to some kind of chemical, which is known to the State of California to cause cancer.