GF9 Magnetic Basing System:
(25) 25mm Square Bases w/Insert

Each bag of bases contains the magnetic bases pre-cut and ready to use as listed on the package. The bag also contains a "rubber steel" insert so that players can use their new bases with any movement tray system.

No need to buy separate magnetic sheeting, tin for your trays, then assemble your bases. Everything is ready to go, right out of the package.