Sprinkler, lotion pump, hand wash pump and length measurement
Sprinklers: bayonet (half bayonet aluminum, full bayonet aluminum), screw is plastic, but some are covered with a layer of aluminum cover, a layer of anodized aluminum.
Lotion pump: vacuum and suction tube, are screw. A large layer of anodized aluminum can also be placed on the screw cap and head cap. Divided into sharp mouth and duck bill two. Washing the hand pump: The caliber is large and they are all screw holes. A large layer of anodized aluminum can also be placed on the screw cap and head cap. Generally, the steps are threaded, and there are no steps left and right knobs. Length measurement: Syringe length (from pad to hose end or FBOG length).
Exposed length. And the length from the start of the measurement under the hood (equal to the length of the bottle shoulder to the bottom of the bottle)