Accel's precision ground, highly polished compression and injection molding equipment manufactures the finest Distributor Caps and Rotors. Caps are stress-relieved immediately after molding in special fixtures to ensure dimensional stability. High conductivity, corrosion resistant brass inserts and stainless steel rotor springs provide unrestricted spark energy flow. High performance 60kV-rated tan alkyd molding compound (mineral filled polyester for late model Ford and GM parts) is used for superior protection from arc through and crossfire. Heavy-duty black alkyd caps and rotors are also offered as a lower cost alternative.