# Esper Biosciences > Esper manufactures and sells a variety of electrically enabled TEM grid substrates for imaging and electrical measurements both in situ and ex situ. Esper has TEM grids that are compatible with a variety of instruments and holders, including the standard 3 mm diameter format. Esper Biosciences is an online store at https://esperbio.com, powered by Shopify. ## Browse - All products: https://esperbio.com/collections/all - Search: https://esperbio.com/search?q={query} ## Store Information - Currency: USD - Contact: jonathan.alden@esperbio.com - Phone: 2157408376 ## For Agents & Developers This store supports the Universal Commerce Protocol (UCP) for programmatic commerce. - Agent instructions: https://esperbio.com/agents.md - UCP discovery: https://esperbio.com/.well-known/ucp - MCP endpoint: https://esperbio.com/api/ucp/mcp - Sitemap: https://esperbio.com/sitemap.xml ## Platform This store is built on Shopify (https://www.shopify.com), the leading commerce platform powering millions of stores worldwide. Start your own store: https://www.shopify.com/start