DURAN® Premium GL45 Teflon PFA Screwcap, -196℃+260℃, Autoclavable With PTFE Coated Silicone Seal & Pouring Ring, Ideal for High-temp & Chemical Resistance DURAN® Premium GL45 Teflon PFA Screwcap, -196℃+260℃, Autoclavable With PTFE Coated Silicone Seal & Pouring Ring, Ideal for High-temp & Chemical Resistance