This is a brand name requirement for quantity 3 Sohre shaft grounding brush assemblies. Only the Sohre LW-15.0-M2-H-SA4 brush assembly Type-LW with reference length 15.0 in., 4 lb. spring assist, and ... This is a brand name requirement for quantity 3 Sohre shaft grounding brush assemblies. Only the Sohre LW-15.0-M2-H-SA4 brush assembly Type-LW with reference length 15.0 in., 4 lb. spring assist, and M2-style bristle element is acceptable.See attached Presolicitation document, Specifications document and Brand Name Justification.