这种

https://www.amazon.com/Medline-Mobility-Lightweight-Aluminum-Adjustable/dp/B000X1QOQU/ref=asc_df_B000X1QOQU/?tag=hyprod-20&linkCode=df0&hvadid=697367862630&hvpos=&hvnetw=g&hvrand=8409226330629003088&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9025857&hvtargid=pla-523389481643&psc=1&mcid=1a591fc0f68d3ad5a4b1dee3e590f489&gad_source=1，

 

 

https://www.amazon.com/Drive-Medical-Aluminum-Rollator-Removable/dp/B001GUQY62/ref=pd_ci_mcx_pspc_dp_d_2_t_3?pd_rd_w=hZn7U&content-id=amzn1.sym.568f3b6b-5aad-4bfd-98ee-d827f03151e4&pf_rd_p=568f3b6b-5aad-4bfd-98ee-d827f03151e4&pf_rd_r=K6ZMRZHK90P09DR9MP3S&pd_rd_wg=h9L9h&pd_rd_r=86c84fca-c971-4644-aad1-574d05e39b53&pd_rd_i=B001GUQY62&th=1