This is the replacement walking belt size 18x104 for the Proform 770 EKG. Model Number: 291661. Part Number: 173063. Fits the following models: DRTL59220 , DRTL59221 , DRTL59222 , DRTL59420 , DTL54940 , HETL40630 , HETL42140 , HRTL08010 , HRTL08011 , HRTL08012 , HRTL393050 , HRT07920 , HRT07921 , ICTL39520 , ICTL39522 , ICTL39523 , IMTL07800 , IMTL07900 , IMTL22990 , IMTL22991 , IMTL22992 , IMTL22993 , IMTL315040 , IMTL39520 , IMTL39521 , IMTL39522 , IMTL39523 , IMTL39524 , IMTL39525 , IMTL39526 , IMTL39620 , IMTL59610 , NCTL79061 , NMTL06920 , NTTL79060 , NTTL79061 , PCTL21460 , PCTL21461 , PCTL40070 , PCTL49490 , PCTL53590 , PCTL53690 , PCTL53691 , PCTL59100 , PCTL59190 , PCTL59210 , PCTL69610 , PCTL93070 , PCTL99010 , PCTL99011 , PETL21460 , PETL21461 , PETL21462 , PETL61010 , PETL61020 , PETL62010 , PETL62020 , PETL62021 , PETL62022 , PFTL21460 , PFTL21461 , PFTL21462 , PFTL34060 , PFTL40070 , PFTL40580 , PFTL49100 , PFTL49101 , PFTL49102 , PFTL49103 , PFTL49210 , PFTL49400 , PFTL49401 , PFTL49490 , PFTL49500 , PFTL49610 , PFTL49720 , PFTL49721 , PFTL52570 , PFTL52571 , PFTL57550 , PFTL590040 , PFTL59020 , PFTL59021 , PFTL59022 , PFTL59023 , PFTL59100 , PFTL59103 , PFTL59104 , PFTL59120 , PFTL59121 , PFTL59190 , PFTL59210 , PFTL59410 , PFTL59520 , PFTL59610 , PFTL59810 , PFTL59820 , PFTL59821 , PFTL59822 , PFTL59823 , PFTL5982 H2 , PFTL59920 , PFTL59921 , PFTL61930 , PFTL61931 , PFTL6193 S0 , PFTL69210 , PFTL69211 , PFTL69212 , PFTL69213 , PFTL69610 , PFTL69820 , PFTL89200 , RBTL59110 , RETL16000 , RETL16001 , RETL16080 , RETL16081 , RETL16082 , WCTL39320 , WCTL49300 , WCTL93060 , WCTL93070 , WCTL93071 , WETL35020 , WLTL11560 , WLTL11561 , WLTL11562 , WLTL11563 , WLTL393040 , WLTL393041 , WLTL39320 , WLTL39321 , WLTL39323 , WLTL39324 , WLTL39325 , WLTL39326 , WLTL41570 , WLTL41571 , WLTL42070 , WLTL42570 , WLTL42571 , WLTL42572 , WLTL45310 , WLTL45311 , WLTL48410 , WLTL49200 , WLTL49201 , WLTL49300 , WLTL62790 , WLTL62791 , WLTL93060 , WLTL93061 , WLTL93062.