The H-12NP is a anti-static metal single joint needed to assemble the HJ-12NP joint set. This product is a different version of an H-1NP that can be assembled on a hinge. To build an HJ-12NP you just need to group two H-12NP around an AP-HINGE, creating a tee joint that can rotate.
A Flexpipe Product
For technical details and images, please search for the product using the 80/20 interactive catalogue found here: https://catalogs.8020.net/80-20-Catalog-26/C/.