Page 1 1 SR Passives MACHINED SOLID ALUMINUM KNOBSPage 2 2 SR Passives MACHINED SOLID ALUMINUM KNOBSPage 3 3 SR Passives ABS PLASTIC KNOBSPage 4 4 SR Passives ABS PLASTIC KNOBSPage 5 5 SR Passives MACHINED ALUMINUM SHELL WITH PLASTIC INSERT KNOBS