Premuim quality treadbelt (running belt) used on Cybex models 450T, 500T, 515T, 520T, 530T, 550T treadmills. With 58" walking surfaces.  Units with serial numbers less than model 500T = X07-07520T9814NN, model 515T =  X07-07515T9514NN, model 520T = X07-07530T9814N, model 530T & 550T = X07-07530T9814NNused on Cybex models 520, 530 treadmills.

NOTE: We strongly recommend you apply lubricant when you replace any new treadbelt.