Sold as two bushings with a sticker
APS stands for Animated Polymer System. This urethane is very lively giving you more turn that a same durometer stock bushing, with lots of rebound. APS doesn’t compress the same as stock bushings and other formulations, so you can take it from the standard just snug washers to a few full turns without effecting the compression and decompression characteristics.
Canon bushings were thought designed around the Paris Truck Company's signature hanger, but also fits on hangers with wider bushing seats like the new Caliber III trucks, or even Bear Gen 6.
The Canon is just a smidgen wider than a standard barrel so it's Return to Center is a little higher and break from center is a little more than a barrel. A perfect bushing for when you need to take out just a little turn for wheel clearance, but otherwise like how your double barrel busing feels.