I'm fairly certain the included Traxxas shock oil is 30 weight:
https://www.amazon.com/Traxxas-1666-Silicone-Shock-Oil/dp/B0006O5GKY
30 weight is the usual starting point for 1/10th rock crawler shocks and is included in most kits.
I have 2 pairs of Traxxas 2662 (XX-Long) Big-Bores, picked up the ones slightly longer than standard Axial Bomber King shocks - going to use the stock Axial Bomber kit springs as they fit perfectly and 30 weight oil for a relatively light Bomber build.
I'll try to remember to get the exact measurements edited into this post after I get around to digging them out of the shoebox of new parts I've got set aside.
I also bought the Gmade XD Diaphragm 103mm shocks, they come with medium springs but options include soft and hard replacements:
"Length (Mounting hole to hole): 103mm Shock Body Diameter: 14mm Spring Diameter: 19mm Spring Length: 68mm Full Shaft Travel Range: 31mm (without Rubber bump stop) Shaft Diameter: 3.5mm"
Unsure as to the included shock oil weight, haven't found that mentioned anywhere yet - I will likely use 40 weight Team Associated shock oil for them and I've ordered the hard springs as they will be going on a heavyweight modded Bomber.
Traxxas TRX-4 GTS shocks are super-nice, I picked up a set of take-offs from a Tactical version on fleaBay for very cheap - they are fairly short - 90mm.
"Silver-anodized aluminum bodies
Threaded bodies with collars easily adjust ride height
O-ring cap seal and dual X-ring shaft seals"
I'm currently only using them on the rear of my Vaterra Ascender K10, with a Boom Racing aluminum rear shock tower set with multiple shock mounting locations - using the lowest holes they still lower the ride height a bit from stock shocks, but I am running 4.19" tall tires so that's actually desirable.
If I can get a non-defective set of Boom Racing front shock towers, I'll be installing the other pair of GTS shocks as well. Just using the included shock oil for now, they were prefilled because they were take-offs - haven't leaked yet!
I picked up a pair of Xtra Speed 100mm aluminum shocks that are internally sprung - I might use them as secondary rear shocks on the lightweight Bomber build - maybe without oil, as the primary shocks will take care of the rebound control with their oil.
I only bought them because they were just $10 from a member. They are visually similar to RC4WD polished-aluminum shocks but with larger diameter bodies - the rod-ends are aluminum as well.