This is a marketing mix.
Pair of 15mm rods-8 inches/20cm long;
Pair of 15mm rods-12inches/30cm long;
Includes:
2pcs M12-20cm rods
2pcs M12-30cm rods
2pcs Rod connectors
Material: Aluminum Alloy
Weight: 230gThey are industrial standard 15mm rods for 15mm rod systems.15mm rod connectors are included. It allows you to connect the 15mm rods together.Both 2 pair of 15mm rods has inner M12 thread on each end of the rods.