Dave Holden has been a tremendous help in the creation of the Radiation Shielding Enclosure. Dave took our original design and modified the design to meet our needs and save us a great deal of money. The Radiation Shielding Enclosure workmanship and quality have meet our specification. Once Dave Holden received the order the enclosure was built and delivered in less than a month. I would recommend MarShield for any project related to radiation shielding. Thank you MarShield and Dave Holden for the safe guarding of the employees of our NDI Lab.