The 90mm splice kits are used to successfully splice/join two APEX 90mm posts together, thus creating a taller frame. The Australian Standard for Steel Racking AS 4084:2012 sets out guidelines for when and how splice kits should be used. If used incorrectly it can weaken the upright.
Splice Kits
(SKU) RH-KIT70
Splice Kits container;
2x splice plates with 5 holes in each
5x Splice tube spacers 43mm
5x Nuts & Bolts M10x65mm to bolt the entire set together