Easily move storage Dewars and Dewars with canister storage systems. Sturdy cast aluminum frame has five wheels with ball-bearing swivel casters. Use model 03773-65 for Dewars with 15.6" diameter base; use 03773-71 for Dewars with 18.8" diameter base. Shpg wt 8.0 lb (3.7 kg). Note: Roller base does not include tipping stand.