... 3. Radiation resistance 4. Oil resistance silicone case for iphone4 MaterialNR,CR,NBR,SBR, SILICONE,VITON,EPDM, HNBR, BUNA, etc. ... free test slabs and hardness testers can be offered for customer's testingPackageInner plastic bag/outside carton/wooden palletsPayment ... T, Western Union, MoneyGram Delivery timeSamples can be ready for shipment within one week normally. Production orders can be ...