Check the listing for details. LMINE MgO Cupels Magnesia No. 7A, Pack of 30 Free Shipping (17619-30). Condition: New. Listed at 36.33 USD. MgO magnesia cupels, pack of 30. Special "egg crate" tray holds cupels securely and minimizes damage in transit. Ideal for testing and small scale assaying. Size 7A. (same diameter as 1-9/16, #7, #6A, SA) . Will absorb approximately 40 grams of lead. Approximate dimensions: Size Outer Dia Dia of Cup Dia of Bottom Height of Cupel Depth of Cup Weight (Approx) 7A D D1 D2 H H1 (grams) mm 39.7 31.2 30.0 28.5 11.8 59.0 inch 1.56" 1.23" 1.18" 1.12" 0.46" 59.0 Due to shipping and handling, some minor chipping of the cupels is possible and should be expected. The product is still usable with these small defects should they occur.Free shipping to US lower 48 states only.MgO magnesia cupels, pack of 30. Special "egg crate" tray holds cupels securely and minimizes damage in transit. Ideal for testing and small scale assaying. Size 7A. (same diameter as 1-9/16, #7, #6A, SA) . Will absorb approximately 40 grams of lead. Approximate dimensions: Size Outer Dia Dia of Cup Dia of Bottom Height of Cupel Depth of Cup Weight (Approx) 7A D D1 D2 H H1 (grams) mm 39.7 31.2 30.0 28.5 11.8 59.0 inch 1.56" 1.23" 1.18" 1.12" 0.46" 59.0 Due to shipping and handling, some minor chipping of the cupels is possible and should be expected. The product is still usable with these small defects should they occur.Free shipping to US lower 48 states only.