As a manufacturer of a comprehensive range of fall protection and access products including steps, stairs & walkway we use a lot of tube and fittings in our products. 
Over the years we have found the Kee-klamp range to be the most versatile & of consistently high quality. 
As a Kee-klamp approved distributor we hold a stock of both tube & fittings at our Sheffield base.
Safety Barrier Components KEE KLAMP cast iron tubular fittings offer the most flexible solution for the construction of safety railing, handrails, guardrail and barriers.
KEE LITE aluminium components offer lighter weight flexible solutions for the construction of safety railing, handrail, guardrail and barriers. 

KEE-Lite Fittings Guide
KEE ACCESS fittings are used to create smooth surface handrailing compliant with UK disability legislation and Building Regulations Part M. 

Kee-Access Fittings Guide