You are looking at a pack of 4 Audio Origami PTA Plastic Spacers (shims) for VTA adjustment of Rega RB200/RB250/RB300 tonearms.

The 4 spacers (shims) you will receive are the following sizes:

1 x 3.9mm
1 x 2.9mm
1 x 2.0mm
1 x 1.1mm

These spacers/shims can be used separately or can be combined to obtain the perfect VTA for your tonearm/cartridge combination.

Audio Origami at a glance

Who is Audio Origami? Audio Origami means the ex-Syrinx Scotland's audio wizard John Nilsen!

"The Audio Origami PU7 is one of the most advanced turntable tonearms in the world. It's also, obviusly, due to its high specifications, une of the most musical tonearms today available". 

"Excellent tonearms from Scotland's audio wizard John Nilsen. This arm has grunt, deep soundstaging, with ebb and flow that will startle you". David Beetles, Hammertone Audio, Canada 
"The PU7 is an awesome arm and every bit as good as, (if not better than - considering cost) the Linn Ekos SE".