same axle on wrr and wrx?

hello guys, i'm gonna buy axle sliders on ebay, but they are for x models.

i ask the guy and he asked me:
Could you measure the spindles, and then i could see if they're the same as the x model?

so i'm asking myself about the axle, is it the same for X and R

i find this on the service manual:

Front wheel
Wheel type Spoke wheel
Rim size WR250R 21x1.60
WR250X 17M/C x MT3.00
Rim material Aluminum
Wheel travel 270.0 mm (10.63 in)
Radial wheel runout limit 2.0 mm (0.08 in)
Lateral wheel runout limit 2.0 mm (0.08 in)
Wheel axle bending limit 0.50 mm (0.02 in)

Rear wheel
Wheel type Spoke wheel
Rim size WR250R 18x2.15
WR250X 17M/C x MT4.00
Rim material Aluminum
Wheel travel WR250R 270.0 mm (10.63 in)
WR250X 265.0 mm (10.43 in)
Radial wheel runout limit 2.0 mm (0.08 in)
Lateral wheel runout limit 2.0 mm (0.08 in)
Wheel axle bending limit 0.50 mm (0.02 in)

i don't speak very well english, i need your help!!

thanks

They're the same axles, at least in the US of A.
Check an on-line Yamaha parts catalogue over there and compare part numbers.