Single OREGON Blades 92615 is 21.4", .675 Star center hole. Made in USA. Replaces major brands. John Deere models : 102, 115, 125, 135. Arnold: 490-110-0094, 490-110-0140. Home Depot: 232408. John Deere: AM137327, AM137328, AM137329, AM137330, AM137333, AM141031, AM141032, AM141033, AM141034, GX22151, GY20850, M149422, M154061, M154062. Rotary: 11594, Rural King: 66892307. Stens: 302-456. Sunbelt: B1PD5016. Tractor Supply: 1010765. This is an Aftermarket part. Thanks for looking!