Built-In Level Design: The Two hole pins have a built-in level, so you don' need to prepare a separate level, which makes it quicker and more intuitive to check if the flange is level. Material: Our products are made of aluminum with anodized black oxide, which makes the it more and lasts for a long time. The thread is also precisely machined and can be perfectly aligned with the pipe flange. Easy To Use: The two-hole pin set is quick and easy to use, because are ergonomically designed and individually inspected, can bring convenience to your work. Perfectly Positioned: If you are working on a piping project and you need two-hole pins to align your flanges. Our two-hole pins are very suitable for ½inch - 14inch ASME 150LB flanges. Please note:There may be slight color difference or discrepancy in the actual product, which does not affect the use, please don' mind, thank you! Color:Black Material:Aluminium Package Contents: 4 * flange Alignment Pin Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.