Choose Class A for quantitative analysis, QC and calibration (per JJG 196, tighter tolerances). Class B suits teaching and routine screening at lower cost.

Low thermal expansion (3.3×10⁻⁶/K), excellent chemical resistance and thermal shock tolerance — the standard material for lab glassware.

All glassware ships in shock-proof packing. Inspect on delivery; send photos to sales@yiqi.cn and we replace broken pieces free within 48 hours.