2.5oz polyethylene cartridge. Semco disposable cartridges are molded from high density polyethylene, which makes them capable of handling a wide variety of chemical fluids for storage and application. Use them to load your own adhesives, sealants, lubricants, or other media for use with Semco dispense guns. Each package comes with a cartridge and plunger. Nozzles are not included and must be purchased separately. 1 lbs (0.5Kg) shipping weight.