Parafilm M roll 4 in x 125 ft Merk: M Cat Nr: PM-996 Made in USA PARAFILM stretches up to 200% and clings even around irregular shapes and surfaces. The sealing film is free of plasticizers and consists primarily of polyolefins and paraffin waxes. PARAFILM M is resistant up to 48 hours against many polar substances, eg saline solutions, inorganic acids and alkaline solutions. Product features: - Small piece of this film will seal test tubes, beakers, flasks, culture tubes, etc - Made of a semi-transparent, flexible and waterproof material - Resistant to most acids and alcohols yet is gas permeable - parameter: -45-+50 °C temp. range