Educational Science Model Physical Science Optical Experiments Set Including Multiple Lenses,Optical Experimental Platform And Two Light Sources For School Physics Teaching Instrument Children Sc Sci : Amazon.co.uk: Stationery & Office Supplies
Double Concave Spherical Lenses: -5D, FL:200mm - Pack of 5
CLEAR
Double Convex Spherical Lenses: +5D, FL:200mm - Pack of 5