As far as I can tell, this is the best price on them ($14.04). The black ones are impregnated with graphite, so they are very slippery (so not squeaky). Pretty easy to fit, fit like the original rubbers and the ride is nice!
MI Motion Sensor YTC4041GL motion sensor
14 Review
Long-Lasting 4LIFETIMELINES PVF-Coated Steel Brake, Fuel, Transmission Line Tubing Coil - 3/8 X 25 Ft
11 Review
Power supply 12V, 40A, 500W (Hongwei HW-12V-500W)
12 Review
CASIO Collection Men AQ-S800W-1B quartz watch, alarm clock, stopwatch, countdown timer, waterproof, power reserve indicator, hand illumination, display illumination, black
13 Review