Discoverer Core Markers or Core Blocks come as 2 different varieties.
Option 1 - Core Blocks
The Plastic Core Blocks, are a 'block' as the name implies. These are essentially direct equivalent to the old industry standard wooden core blocks, but made from plastic. Simple as that. They have an etched top surface perfect for writting on with a permanent marker pen
Option 2 - Clip-in Core Markers
The Plastic Clip-in Core Markers, suit every size BQ, NQ, HQ and PQ Discoverer Core Trays. The unique clip in core marker allows you to maximize the use of your core trays by separating the core quickly and easily. The core markers are colour coded to identify specific core size and come with an etched flat surface on the top facing aspect to allow you to record notes permanently.