These are the Knuckle Arm Bushings from Ofna. FEATURES: Steel construction, black in color Replaces worn or damaged knuckle arm bushings INCLUDES: Four knuckle arm bushings REQUIRES: Installation following the model manual SPECS: Length: .47" (12mm) Inside diameter: .16" (4mm) Outside diameter: .24" (6mm) tlw 2/8/08 ir/jxs