JLG Parts Arm Rest Bumper for use on JLG R and RT Scissor MEWP(Mobile Elevated Work Platform) Machines. These Bumpers are used on the scissor arms to allow the arms a place to rest on when in the down position. Bumper have a diameter of 1.5" and a thickness of 3/16". Model Use: 4045R, ERT2669, ERT3369, ERT 4069, ERT 4769, R4045, RT2669, RT3369, RT4069, RT4769. Please ensure proper model and serial number before parts purchase.