EISCO 6PK Equilateral Prisms 3pc Set - 1", 2", & 4" Lengths, 25mm Face Size - Acrylic - Classroom Pack (Six, 3pc Sets - 18 Pieces Total) Labs electronics3 4A USB Adpater Block Plug

4A USB Adpater Block Plug 30W 3-Port wall charger allows you to charge up to 3 devices at the same time

STRONG AND DURABLE:thanks to the super tough knotted steel wires

Output: 48V - 0

which can be powered by USB

EISCO 6PK Equilateral Prisms 3pc Set - 1", 2", & 4" Lengths, 25mm Face Size - Acrylic - Classroom Pack (Six, 3pc Sets - 18 Pieces Total) Labs electronics3 4A USB Adpater Block PlugEISCO 6PK Equilateral Prisms 3pc Set 1", 2", & 4" Lengths, 25mm Face Size Acrylic Classroom Pack (Six, 3pc Sets 18 Pieces Total) Labs Product Features 3 prisms 25, 50 and 100mm long prisms 1" or 25mm sides Classroom set of 6 sets of 3 = total 18 prisms