This specification covers the physical dimensions and characteristics of a laboratory burner to be used as an ignition source for small-scale burning tests on plastic materials. The burner is used with methane, propane, or butane supply gases for flame heights of 20 to 125 mm. Note 1 -The burner described in this specification is suitable for use in the following ASTM standards: Specification C 509, Test Method D 229, Test Method D 635, Test Method D 876, Test Method D 3014, Test Method D 3801, Test Method D 4804, Test Method D 4986, and Test Method D 5048. Safety hazards and known limitations on applicability of fire-test-response standards are addressed in the individual test methods. Note 2 -This specification is equivalent to the ignition source specified in IEC 60695-11-3, Annex A and IEC 60695-11-4, Annex A. Note 3 -This specification is equivalent to the P/PF2 ignition source specified in ISO 10093.