Camera House Sevenoak SK-C03 DSLR Cage Aluminium Construction Kit fits most DSLR's

Roller Bearing Sliding System 22 lb Load Capacity 34.2" Travel Distance 39.4" Total Track Length Steel Ball Bearings & Polymer Wheels Adjustable Friction System 3/8"-16 and 1/4"-20 Mounting Threads 3/8"-16 Tie-Down Screw Bubble Level