These extruder discs are for the large extruder gun which you can find here. 
The puzzle pieces have been design to join together as a normal puzzle would. Each piece is available in a large and small size, also if you need smaller pieces they are available in the 18, 23 and 24mm disc range.
 
I have tried to give each piece a sensible name to help identify each disc. They are identified as a corner, edge or middle piece and then by the join style, for example:
Corner 2 in  is a corner piece with 2 slides that go in
Edge 1 in 2 out is an edge piece with 1 join that goes in and 2 that stick out
I know this may be a bit confusing (it's the best I could think of) if you are unsure please click on the drop down box and as you select each item an image of the puzzle piece will come up.
 
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The large puzzle pieces are approximately 2.5cm square, with and parts that point out increasing the relevant side by 0.5cm
The small puzzle pieces are approximately 1.7cm square, with and parts that point out increasing the relevant side by 0.4cm
 
These discs are also available in the 18mm, 23mm and 24mm ranges which will give a smaller embed size if required.
 
These discs will fit other large extruders, please just check the size if you have a different extruder. The diameter of the disc is 57mm.
 
The discs are only suitable for use with soap dough, not suitable for melt and pour soap.
 
There is a special postage rate available when buying scrapers and/or extruder discs only, as they can be sent 'large letter' size. Please select this option at the checkout. This postage option cannot be used if your order contains anything other than scrapers and extruder discs.
 
The discs are made from PLA, which is a plant-based material, and therefore environmentally friendly
 
These extruder discs will last you for many uses and help you create many beautiful soaps as long as you take care of them.

After use, wipe with a cloth to remove excess soap batter. I always find the discs easier to clean if you wipe and wash them soon after using.
Wash with warm soapy water, rinse and dry.
Your extruder discs are made from PLA which is a temperature-sensitive thermoplastic polymer derived from renewable resources such as corn starch or sugar cane. PLA will start to deform and melt at around 60°C (140°F), please ensure your washing water is below this temperature
and never put your extruder discs in the dishwasher