Steerer: Alloy Straight tube:28.630221mm;Tapered tube:28.639.8258mm. 27.5inch: 1670g 1790g +/-50g. The change is very noticeable compared to a spring fork. Very affordable option if you're building a entry level bike.
Compression and rebound were decent when bouncing the bike while riding. At 185lbs, riding off the 6" curb caused the shock to compress about 1.5". Paint job is good quality and the shock looks nice.