Our lightest weight tom stand, The 3900 features the same dual tom ball-and-socket/auxiliary clamp top as our popular 9900, but lighter gauge Tubing makes it substantially more portable than its heavy-duty cousin. The 3991 single tom/accessory stand is a super-sturdy and versatile solution for adding to your setup. A sturdy double-braced tripod base still supports heavy rack Toms, multiple cymbals and accessories. [3/4" Upper tube] [1" Base tube].