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First Surface Mirrors
Optical imaging folk insist that their reflective surfaces be on top of the glass, because an optically minor “ghost” is created with back surface mirrors. These “First Surface” optical mirrors generally also have better glass and flatter surfaces than their household brethren. Delicate, with the fragile reflective surface exposed, they carry the prices that precision demands. If you are playing with lasers, photography or optical alignment, the first surface items below are what you need. Dimensions are included in the description as width x length x thickness, all in mm.
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69134 MIRROR, FS, 1.5 X 1.5 X 1 | |
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68361 MIRROR, FS, 77 X 194 X 3 | |
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68677 MIRROR, FS, 79 X 140 X 2.8 |
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Do Not (Fill In The Blank)
We know there's a message in this 12" dia safety sign with the classic slashed circle. It's red and white on reflective, adhesive-backed vinyl, and the graphics mean "Do not put out fire with liquids." Given its limited application, we're more excited about cutting out the white sections and putting the red circle/slash over a photo of our least favorite politician. But hey, if you're on the safety committee, knock your socks off. Just make sure the sign isn't hung upside down. Then it says "Do not let fire rain into your coffee."
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19507 SAFETY SIGN |
Phone Line Filter
This 7-foot length of standard 4-wire gray telephone cord has a modular plug on each end and an in-line 1-1/2" x 1" dia RF filter at one end. 'Nuff said.
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34424 RF FILTER |
Ceramic Reefers
Beautiful refrigerator magnets, all set to be imbedded in your child's best ever creation for refrigerator work. Six file card holding power, 3/4" dia x 3/16" thick ceramic with beveled edges to minimize chipping. They don't come much better than that!!
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89444 CERAMIC MAGNET, 3/4" |
Das Charleston Ball
Sure, you call it a disco ball, but it's our business to know that the classic rotating mirror sphere first got famous in German ballrooms in the Twenties. This one is 7-3/4" dia, covered with small plastic mirror chunks ready to throw festive light around the room of your choice. Comes with a 3 rpm motor with (3) 3/16" mounting holes, a grounded 33" power cord to plug into either a ceiling outlet or an extension cord, a short length of chain, plus slip-rings, screws and mollies for hanging. 23-skidoo, mein herr.
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93114 MIRROR BALL |
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RARE FIND!
Rare earth magnets are usually killers for their size, and these thick nickel neodymium discs are no exception. The price, on the other hand, for (3) 7/16" dia x 1/4" 5-lb lift or (2) 9/16” dia x 3/16” 8-lb lift magnets each stored on a 2" dia steel disc, is a rare exception.
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93463 MAGNETS, SET OF 2 | |
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92042 MAGNETS, SET OF 3 |
Sunprint® Kit
Sunprints (or cyanotypes, or photograms) are everyone's favorite photo-sensitivity experiment, from third-graders to graphic artists and fine artists. You pick: The Sunprinters are a dozen 3-15/16" square sheets of photosensitive paper, an acrylic backing sheet and instructions. The large Sunprint Kit has (15) sheets of 12" x 7-3/4" photosensitive paper plus a clear acrylic sheet of the same size. Great for classroom demonstrations, and can be used to make prints from photo negatives as well as interesting effects from opaque or translucent objects. All you add is sunshine and water.
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93519 SUNPRINT KIT, LARGE | |
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3805 SUNPRINTERS |
Killer Magnet
Once upon a time, a copywriter put this little magnet next to his computer monitor and got really pretty, wavy, aurora-like effects. And then got a new monitor! Don't try this at home. Our shiny, silver-colored 1" x 1" x 1/2" neodymium magnet looks innocent, but is industrial strength, pulling something like 25 lbs with enough strength left over to erase all your credit cards. And wreak havoc with your monitor.
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38694 KILLER MAGNET |
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Magnetic Pull
Add a door/drawer pull to any ferrous surface with this 1" dia x 1/4" thick neodymium disc in a polished sleeve with a 3/16" dia hole in a stand-off. Comes with a 1" slip-ring attached, and hangs on for 22 lbs worth. Plenty handy for hanging stuff from other stuff, too.
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93515 MAGNET & PULL |
Gurneyteed To Roll
It's slim but a mighty good roller, like a swivel-plate caster on a hospital gurney. This one measures 5" dia x 1" wide, with a plastic wheel and smooth rubber tread. It has a 1/4" axle, 3-5/8" x 2-1-2" plate with (4) slotted 5/16" mounting holes and a foot brake. Ought to carry approx 200 lb. Don't forget to order the other three.
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38859 SWIVELING CASTER |
Good Heavens!
And they're even better when you can locate and name the stars. "Sky Challenger" is a multiple star-map kit from the astronomers at Cal Berkeley. You get an intro star map, a Native American star guide, a map of binocular-visible stars, star clock, planisphere, and much more. Most are laminated 10" rounds. It includes a holder and a fact sheet with games.
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93583 SKY CHALLENGER |
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