... is OK Won't bring in impuritiesCustom Rubber Suction Cups Property:High/low temperature resistance,oil and fuel resistance ... Silicone,Viton etc. Hardness:30-90ShoreADelivery:In 10 daysPacking: Plastic bag & carton box or according to your requirements. Application: ... grommets,rubber washers ,rubber bumpers,rubber bellows,rubber suction cups,rubber pads,rubber bushings,rubber plugs,rubber bracelets etc. ...