The Holdrite Thru-Stud Isolator Plastic 3/4" 162J15 is a pack of 15 isolators designed for plumbing applications. These isolators are made of plastic and are specifically designed to be installed through studs for added support and stability. The product is manufactured by Holdrite, a reputable brand known for producing high-quality plumbing fixtures and accessories. This pack of isolators is suitable for various plumbing projects where isolating pipes from structural elements is necessary.