A layer of soft LDPE is sandwiched between two thin layers of aluminum for strength and rigidity. Multipurpose Plastic Selector Packs Packs include one 2” square of HENAN OKAY, Delrin acetal, LDPE, HDPE, UHMW, HENAN Okay, cast HENAN Okay, polyester, polystyrene, Rexolite polystyrene, and Noryl PPO.
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