... 530mm2. Color: black, white, yellow, brown, green, blue, transparent, red, natural etc.3. Hardness (Shore A) :30-904 ... a right stop . Factory history8 yearsFactory area3700m2CertificateISO/TS16949Machines(20sets)Rubber mixer, Automatic slitting machine, Slicer, Flash device, ... 2000 setsWorker 150-200Staff25QC5Main productso rings, gaskets,custom rubber parts.Material Nitrile(NBR), HNBR, EPDM,Silicone, ...