Specifications:
Type: Gearbox gear head
Spline: 4 4T will fit square 5mm shaft
Size: 13x8 cm /5.1x3.1 in
Connector Diameter: 26mm
Color: As picture shows
Fits for: all 26MM 4 SPLINE Gearbox Gear head Machine
Package includes:
1x 26mm 4 Spline Gearbox Gear head

will fit most machines with square shaft, like stihl and mountfield, you may need to use a universal guard if guard is part of the gear head