This is the Hot Racing 90mm Aluminum HD Big Bore Shock Set. These big bore threaded body aluminum shocks fit many 1/10th scale off-road vehicles using 90mm shocks. Some applications include, but are not limited to: many 1/10th scale truck and buggy front shocks; the Traxxas Bandit front, Nitro Rustler/Slash/Sport/Stampede front, Rustler front, Slash 2WD front, Slash 4x4 front, Stampede 2WD front, Stampede 4x4 front; and and other similar vehicles. Features: CNC machined 6061-T6 billet aluminum shock bodies, collars, caps, and spring retainers "Big Bore" threaded shock bodies CNC machined 11mm Delrin pistons 3.5mm stainless steel shock shafts Silver and blue anodized aluminum components Vented shock caps with bladder seals for consistent rebound dampening Threaded shock collars with o-rings to prevent unwanted movement Composite plastic lower shock ends with aluminum balls Fully assembled, just add shock oil and bleed Specifications: Replaces Traxxas Big Bore Long Shocks: TRA2660, 3760, 3760A, 4760 Extended length: 90mm Overall length: 100mm Spring: ~5.8lb/in, 1.54mm wire, 10 turn dual rate, 19.3mm OD Includes: (2) assembled shocks (2) M3x20mm flat head cap screws (2) M3x18mm button head cap screws (2) 3mm countersunk washers (2) 5.9 hollow balls (4) 1.5mm thick spacers (4) 3mm thick spacers Requires: Silicone shock oil of modeler's choice and bleeding per the typical bladder shock bleeding procedure Best used with Team Associated shock Green Slime grease or shock o-ring grease when rebuilding lower seal Snap ring pliers when rebuilding lower seal Comments: Use spacers as need for installation Can be used with optional Hot Racing springs: HRASLF48FS261 (progressive), HRASLF48MR268 (linear), HRASLF48RS286 (progressive) See Hot Racing HRATD90PC06 for progressive damping 90mm shocks Accepts optional Hot Racing silicone shock boot HRARDP34201 Replacement parts are Hot Racing: HRARTDS90X (shock shafts and pistons), HRARTD910BN (shock ends), HRARTD910RB (pistons and o-rings), HRARTD1010X (bladders and lower seals)