A.邊長約80mm,厚度4mm~5mm B.邊長或直徑約100mm,厚度4mm~5mm C.邊長或直徑約80mm,厚度約4mm D.直徑約80mm,厚度≥2.5mm
A.52.5R B.42.5 C.62.5 D.62.5R
A.0.500 B.0.505 C.0.525 D.0.530