... other bushings, Fast delivery,Good quality,Competitive price bimetal bushing, JF-20 bi-metal bearingJF series bushing is made of duple ... , and multi-times rolled porous copper alloy surface layer. Features:JF-20 high percentage of tin with aluminum alloy bushing is ... usually used as engine bearing with middle or lower power, air compressor bushing. It is a good substitution for Babbit material ...