Exmark Locking Fuel Cap 126-4107 fits Navigator S, Lazer Z E, Lazer Z S, and Lazer Z X Series mowers. The locking fuel cap is a great way to protect your fuel from theft. Compatible Models: NVS730AKC48000, LZE651CKA484A2, LZE751GKA524A2, LZE742GKC604A3, LZE740EKC60400, LZE801GKA604A1, LZE751GKA604C1, LZE801GKA724A1, LZE751GKA604A1, LZS740AKC524A2, LZS801GKA524A2, LZS749AKC604A1, LZS801GKA604A1, LZS801CKA60RA1, LZS749AKC72400, LZS749AKC724A1, LZS801CKA72RA1, LZS850EKA604W0, LZS850EKA724W0, LZX801GKA60600, LZX801CKA606C1, LZX921GKA60600, LZX921GKA606A5, LZX980EKC606W0, LZX921GKA72600, LZX921GKA726A5, LZX921GKA726C1, LZX980EKC726W0, LZX980EKC96RW0, LZX940EKC606W0