Bought these online and don't want to pay return shipping. These cost $72+tax each on Amazon right now, and significantly more at the auto parts store. Part number: Monroe 181341 Econo-Matic Strut Assembly NEW IN BOX, never installed. Quick-struts are better than just buying strut because no spring compressor is needed for installation, and it's the whole shock/strut/spring/mount thing in one assembly. Will fit Chevrolet Trailblazer, GMC Envoy, pretty much any GMT360 variant as far as I know.