Materials advice Silicone and rubber(EPDM,NBR,SI,HNBR,SBR,CR,BR,IIR,NR etc),as your request, environmental friendly application Automotive,machinery,bathroom facilities,household electrical appliances etc colors Black,transparent,green,red,yellow etc hardness 30 to 40 shore A or IRHD,tolerance can be ±5 shore A,for some special products, we can reach ±3 tolerance High QA/QC system Excellent chemical physical property,high/low temperature resistance,oil , fuel,water, weathering and Ozone resistance etc Technical system Mold design prior to mold making,materials advice and we test samples, then turn mass productions. Mold/samples lead-time For molds,usually in 7 days,for mass production mold usually in 1-2 weeks. www.jiexinseals.com