AHigh quality aluminum tube withaluminum alloy treatment on surface;
BReinforced central vertical tube provides better supportforce;
CSpecially designed expansion tube provides more convenience foradjustment;
DTheres rubber tube inside so as to prevent from friction of metaltube.
EAnti-skidding rubber feet-pad with metal gasket inside makes itmore durable;
FHigh quality plastic armpit supporting cover makes it morebeautiful;
G9 gears for height adjustment. Gear distance (2.5CM)

SizeS M L XLType Heightcm:S:100-120 M:110-130 L:120-140 XL:130-150