Oregon V-Belts are manufactured by CPT-Dayco. These are top quality belts featuring a rubber impregnated fabric cover, high modulus polyester cord and specially formulated belt core. We offer these belts as exact replacements to OEM so there is no need to adjust. Belt length is the outside circumference measurement. Belts always break at inopportune times, so we recommend having a spare around.Belts fit the following models:Deck belt for 72" on Lazer Z, XP Series and standard Lazer Z series. Replaces Part Numbers 643052Belt Width : 5/8"Belt Length : 169 1/2"Belt is covered with Limited Life Time Warranty !