A refractometer is a simple instrument used for measuring concentrations of aqueous solutions. It requires only a few drops of liquid, and is used throughout the food, agricultural, chemical, and manufacturing industries.http://www.zbxyoptics.com/refractometer/

Highway Roller Barrier is designed to prevent vehicles from colliding with obstacles, or to prevent wrong vehicles from entering the opposite traffic flow, which can reduce the occurrence of head-on collisions.http://www.taicheng-highwaygua....rdrail.com/highway-r

Heat Shrink Wrap Bag is ideal for quickly securing and protecting products. Slip the product into the bag and use a heat sealer to seal the bag closed.http://www.sqshrinklabel.com/shrink-bands/

Connector may refer to: Plumbing Electrical connector, a device for joining electrical circuits together (sometimes known as ports, plugs, or interfaces)http://www.silitech-us.com/fan/

Bolts and Screws are fasteners. A bolt is a non-tapered fastener that uses a washer and nut to hold objects together. A screw is a tapered fastener that mates with an existing thread or creates its own thread in a material as it turns.http://www.junlygroup.com/fast....ener-parts/bolts-and