Science › CYLINDRICAL BI-CONCAVE LENS FOR RAY BOX Image 1 of 1 CYLINDRICAL BI-CONCAVE LENS FOR RAY BOX $15.50 Code: AR1110780-2 Add To Cart Added! Code: AR1110780-2 Cylindrical lens, approx. 45mm wide. Focal length 15cm (approx.) (+6.67D). You Might Also Like Quick View LED RAY BOX WITH USB CABLE AND CYLINDRICAL LENS $67.50 Quick View CYLINDRICAL LENS FOR LED RAY BOX (PH0600USB) $9.90 Quick View SPARE SLIT PLATES FOR BUDGET RAY BOX -SET OF 3 $5.20 Quick View MIRROR - PLANE HALF CYLINDER CONVEX - STAINLESS STEEL $27.00 Quick View CYLINDRICAL BI-CONVEX LENS FOR RAY BOX $15.00