RARE 13 INCH SOLAR PARABOLIC MIRROR CRYSTAL CLEAR ACRYLIC PARABOLIC MIRROR 13" DIAMETER * SIZE: 13" Diameter * POWER EST.: 6.3 * BEAM: SPOT * BEAM SIZE MAX POWER--00.3 INCH (additional scatter"3) adds background heat * FOCAL LENGTH: 12 INCHES FROM OUTER RIM - 14 INCHES FROM CENTER BASE * WEIGHT: 1 LB. * MAX TEMP. CLIMB: 745 F IR THERMOMETER * MAX COLLECTION: 987F * MATERIALS TESTED * WATER: 6oz. BOILS 137 sec. * WOOD: FLAME .5 SEC. EXTRA DURABLE ACRYLIC SPRAY IS ADDED TO THE BACK FOR LONG LIFE AND MIRROR PROTECTION! THIS MIRROR HAS MINOR MOUNTING IMPRESSIONS FROM THE CREATION PROCESS BUT HAS NO AFFECT ON SOLAR OR OPTICAL PERFORMANCE WARNING NEVER LEAVE MIRROR UNATTENDED IN THE SUN WARNING : Buyer assumes all risks. If you are crazy enough to use this for sun collection I strongly recommend wearing protective eye goggles (wielding/blow torch) to prevent eye damage. Protective clothing (fireproof) is also recommended as well as a large open space away from structures and autos. CHILDREN OR PETS SHOULD NEVER BE IN WORK AREA! By purchasing this item, buyer agrees to accept all responsibilities and AGREES TO hold seller harmless from injury or damages resulting in the use and possible mis-use of this item. MUST BE 18 years or older to purchase. THIS IS NOT A TOY, REAL SCIENCE STUFF!!!