... tolerance can be +/-5 shore A, for some special products, we can reach +/-3 shore A tolerance.7. Excellent ... water, weathering and Ozone resistance etc. Item nameCustom Rubber ProductSizeCustomized/standard and nonstandardBrand NameRubber ProductMaterialNBR,HNBR,EPDM,SILICONE, ... daysCarton Size50*35*20cmOEM/ODMwelcome Our company product variety Rubber Product ,if you have a mind please contact us ...