Glove ports may be spherical or oval and they are made from extensively ranging products according to the company. A molded port with insert cover presents a crevice free sleeve In the isolator and is very cleanable. Glove ports are positioned ergonomically and therefore are validated with leak/penetration tests. https://tailinscitech.weebly.com/blog/applications-and-benefits-of-tailin-containment-isolator-for-handling-high-potency-materials