Model 105M1-A2-SA
Molded Aluminum Frame, medium duty, easy steering. For vehicles rated up to 10,500 lbs [4762 Kg] GVW. Independent offset rocker arm, oscillating internal suspension for extra smooth ride on all four tracks.
 

Model 105M1-A2
Molded Aluminum Frame, medium duty. For vehicles rated up to 10,500 lbs [4762 Kg] GVW,
Independent offset rocker arm, oscillating internal suspension for extra smooth ride on all four tracks.
 

Model 105M1-A1-SA
Medium duty easy steering/smooth ride model for vehicles rated up to 10,500 lbs [4762 Kg] GVW.
Independent offset rocker arm internal suspension on all 4 tracks.

Model 105M1-A1-SA-M
Medium duty, smooth ride for vehicles rated up to 10,500 lbs [4762 Kg] GVW. Independent offset rocker arm internal suspension on front tracks, solid suspension with 4 rows of ground wheels on the rear tracks.
 

Model 105M1-A1
Medium duty, easy steering/smooth ride. For vehicles rated up to 10,500 lbs [4762 Kg] GVW. 
Independent offset rocker arm internal suspension on all 4 tracks.

Model 105M1
Medium duty for vehicles rated up to
10,500 lbs [4762 Kg] GVW, solid suspension with 4 rows of ground
wheels.