Application: For ASME 150LB Flanges from 1/2”– 16”. For ASME 300LB Flanges from 1/2”– 6”. For ASME 600LB Flanges from 1/2”– 3-1/2”. Compatibility charts are for REFERENCE ONLY. Check Size below to match your needs. Specification: 100% quality assurance tested, more responsive, less expensive, easier to install. Lightweight Construction is Half The Weight Of Steel Pins. For pipe locking alignment. Fine-tuned edge processing. Material & Color: Material: Aluminum Alloy. Color: Black. Package Included: 2x Two Hole Pin . (100% Brand New Never Used Or Installed) Note: Provide Tracking Number With Every Order, Please Buy With Confidence! No installation guides are included, we highly recommend to seek professional installation. Any damage during installation will not be refunded. Will come with everything you see in the picture. Please allow difference due to manual measurement. Please check that the picture matches before purchase. The color of the actual items may slightly different from the listing images due to different computer screen, thanks for your understanding. For any inquiries or special requests such as larger amount ordering please write to us.