Laser cut riser block precision fabricated with multi-uses, comes with 16mm holes at 50mm centres making it perfect for use with all 16mm hole welding tables. Perfect for lifting your jobs up and jigging up bigger projects on any 16mm hole weld fixture tables 200x150x150mm, 6mm thickness, very accurate and square if assembled correctly. Self assembly-self weld kit , 1 block(5parts) Free postage