3/4" x 3/4" x 1/8" N38 Ni-Cu-Ni (Qty 4) [B01905.01905.00318.B2.004]  £2.14 - £3.15 

This is a very versatile and strong block magnet.  It is great for holding things, magic tricks, scientific applications and some customers even use them for magnetic therapy.  Do be careful though, it is quite powerful and can create a bit of a pinch.
3/4" x 3/4" x 1/8" N38 Ni-Cu-Ni (Qty 4)    
     
Dimensions:  3/4 x 3/4 x 1/8 thick (19.05 x 19.05 x 3.18mm)
Material:  NdFeB, Grade N38
Plating/Coating:  Ni-Cu-Ni (Nickel)
Magnetization Direction:  Thru Thickness
Weight:  8.64 g
Pull Force:  40.4 lbs (18.38 kg)
Surface Field:  3,114 Gauss
Core (BrMax):  12,600 Gauss
This product was added to our catalog on Saturday 12 May, 2007.
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Quantity Price Chart
 Base  £3.15 
 5 - 14  £2.99 
 15 - 24  £2.91 
 25 - 34  £2.84 
 35 - 44  £2.76 
 45 - 54  £2.68 
 55 - 64  £2.60 
 65 - 74  £2.52 
 75 - 84  £2.44 
 85 - 94  £2.36 
 95 - 99  £2.29 
 Above  £2.14