This is used Pair OEM Precor rollers. 

Good condition - no noises and very smooth, tested before removal. 

Fits: 

Precor - 5.17i_AMPF_120V

Precor - 5.19_APLK_120V

Precor - 5.21i_SS

Precor - 5.21Si_SF

Precor - 5.23_AEXJ

Precor - 5.23_DF_Q6

Precor - 5.23_SK

Precor - 5.33_AAAB

Precor - 5.33_ADFJ

Precor - 5.33_ATRR

Precor - 5.33_CR_Q7

Precor - 5.33_ST

Precor - 5.35_AMWX_240V

Precor - 5.35_AXGR

Precor - 5.37_AYYR_120V

Precor - C524_I7_K7_LH

Precor - C524_SW_SX

Precor - C524i_A928

Precor - C524i_AMTA_ATRC_AYYC

Precor - C524i_AXFG_AAAE

Precor - C532_64_CF

Precor - C532i_AJNG

Precor - C534_I6_JD_LG

Precor - C534_W1_W2

Precor - C534i_A995_AGJC

Precor - C534i_AA93

Precor - C534i_AMWG

Precor - C536i_AEZC_AGMC_AJTK

Precor - C556i_Navy_ATRT