50mm Diameter Double Convex Spherical Lenses - Rapid PH30067/6, Double-convex spherical lens with a focal length of 300mm. Rapid Double Convex Spherical - Diameter 50mm - Fl 300mm
Steel Extension and Compression Springs - Rapid PH10611A, A closely wound compression steel spring with loops on both ends for attaching to scales and weights, etc. Rapid Steel Spring - Length 300mm, Diameter 10mm
Rapid Chromatography Paper, Packs of 100 Sheets - Rapid F/CP/S100300, This chromatography paper can be used to separate and analyse coloured chemicals and other substances. Rapid Chromatography Paper Grade 1, 100mm x 300mm, Pack Of 100 Sheets