Rectangular hnyav tso cai rau kev ruaj ntseg stacking thiab muaj nyob rau hauv nominal qhov tseem ceeb ntawm 1 kg, 2 kg, 5 kg, 10 kg thiab 20 kg, txaus siab qhov siab tshaj plaws tso cai yuam kev ntawm OIML chav F1. Cov hnyav polished no lav qhov ruaj khov tshaj nws lub neej tag nrho. Cov qhov hnyav no yog cov tshuaj zoo tshaj plaws rau kev siv tshuaj ntxuav thiab siv chav huv huv hauv txhua qhov kev lag luam.
Nws yog ib tug ntev tsim qhov tseeb hais tias ib tug reder yuav txaus siab los ntawmqhov nyeem tau ntawm nplooj ntawv thaum saib