The purchase price of the kit includes free delivery to any postal address in the world. 
 
The kit has the following components:
plastic valve 
adjustable dripper Claber Model 91214
Float with magnet inserted
acrylic tube OD 12mm x ID 8mm x 90mm
top hat rubber grommet 13mm ID
 
The following components are not in the kit and you will need to supply them yourself:
bush 15mm female x 20mm male
elbow 15mm female x 19mm barb
terracotta pot 12cm, 6mm thick, 15mm drain hole
(75mm minimum outer diameter at bottom,
 110mm minimum height)
terracotta saucer 15cm diameter
polypipe 4mm x 250mm
polypipe 19mm x 200mm
barbed takeoff adaptor 4mm
 
The kit includes detailed instructions for assembling the Unpowered Terracotta Irrigation Controlelr.