FITS the below with the 38" cutting deck GT225. this belt connects the blades together on the 38" deck.
fits JOHN DEERE SECONDARY DECK DRIVE BELT LX277 LX279 X320 X540 48" C & Edge
fits John Deere M155096 secondary Deck Drive HEX Belt X300R X305R 42" cut Deck
fits John deere X300 X304 X310 X320 42"M MULCH SECONDARY blade deck BELT M138583
fits JOHN DEERE ENGINE TO DECK PRIMARY V BELT X300R X305R R M162443 M126536
PREMIUME KEV fits JOHN DEERE PRIMARY DECK BELT LTR166 LTR180 LTR 166 180 42"
fits John Deere transmission gearbox drive belt X300R X305R X 300 305 R M152398