JAM Paper Tyvek Envelopes, #11, 4 1/2 x 10 3/8, White, 250 Pack VariesBy:envelope_colour_17838:White|envelope_size_8174:4-1/2" x 10-3/8"|envelope_pack_size_1000101:250 Pack Le bambou est l’une des

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Les ours compteurs d’Eureka sont faits de plastique durable et offrent aux élèves de l’expérience dans le tri d’objets en ensembles

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JAM Paper Tyvek Envelopes, #11, 4 1/2 x 10 3/8, White, 250 Pack VariesBy:envelope_colour_17838:White|envelope_size_8174:4-1/2" x 10-3/8"|envelope_pack_size_1000101:250 Pack Le bambou est l’une desJAM Paper Heavy Duty Tyvek Envelopes are some of the strongest and sturdiest envelopes available. Tyvek is a registered trademark of DuPont, the established chemical company responsible for developing this durable polymer. Tyvek is composed of high density polyethylene fibers, a synthetic material that is extremely hard to rip and tear. This type of material is the same used to build and insulate houses, so you can be assured the materials inside