WHEN NOT IN USE, THE STANDARD SHOULD BE STORED UNDER VACUUM OR IN A SUITABLE DESICCATOR IN A TEMPURATURE CONTROLLED ENVIRONMENT 15 material samples, covering 17 elements from the periodic table.(15 REE’s including Y and La plus F and Al).Available with optional 150μm Molybdenum Faraday Cup. Supplied in a specially designed storage/transportation case that contains:• The standard—protected by an additional specially designed case• A full electronic booklet on a USB, containing:• The standard plan/layout• Certificates of analysis or conformance for each material• Details on storage and care of your standards• Certificate of final inspection & recommended re-polishing date• A replaceable silica gel capsule for protection whilst in transit• A credit card sized quick reference guideA copy of the electronic booklet is also accessible from our cloud storage.