I have Tektro R320 Calliper brakes on my bike:
http://planet-x-bikes.co.uk/i/q/BCTKTR320/tektro_r320_brake_caliper
It's time for some new pads.
However, the ones on this appear to be all in one, bolt straight into the pad on the calliper.
If I look on wiggle, my usual online component supplier, there are lots of blocks for cartridges, or blocks like this:
http://www.wiggle.co.uk/swissstop-flash-pro-green-high-performance-blocks/
But not so many options that look like what is in the Tektro OEM.
How do I know what I can fit? what's compatible?