Purchase of this safety key includes FREE (1) 1.0 oz bottle of silicone for the treadmill maintenance. If you do not receive the FREE 1.0 oz Silicone with the TreadmillPartsZone logo please report the seller via negative feedback. Red Round 1" Treadmill Safety Key. This key will work on the following models; WATL139060 , WATL139060 , WATL149060 , WATL268060 , WETL127060 , WETL127060 , WETL136060 , WETL136060 , WETL136061 , WETL136061 , WETL137060 , WETL137060 , WETL138060 , WETL138060 , WETL138061 , WETL138061 , WETL139060 , WETL139060 , WETL139061 , WETL139061 , WETL147070 , WETL149060 , WETL149060 , WETL268060 , WETL268060 , WETL269060 , WLTL195070 , WLTL198070 , WLTL198072 , 308630