ChemfillerSpecifications 10 oz heavy duty threaded plastic base threaded Threaded black plastic lid and O Ring Brass fittings for attaching to water source Brass fittings for attaching to hose arm Takes liquid or dry chemicals Puts chemicals into the TANKS A LOT Description 10 oz Injector with or without a checkvalve; your option. Makes adding fertilizer or other chemicals into a Tanks A Lot easy. See using the Chemfiller. To insert fertilizer, insecticides,