Cuplock Extension Adaptor for cuplock scaffolding, used to add height to a vertical standard in a cuplock system. It has a silver metal tubular body in which a narrower tube slides into a wider sleeve, with a hole near the joint and a round pin at the sleeve, and cup fittings sit near the lower end. It belongs to a range of cuplock accessories manufactured, supplied and exported from Ludhiana, Punjab, alongside ledger blades, top and bottom cups, standards, diagonal braces, transoms, hop up brackets and ledgers.