Bought these a few years back. Solid metal construction. Has some give since it's an elevated platform but can be bolted down for security (I never did). A pair sells for $480 new. Info and link from the maker below.
https://www.etsy.com/listing/821044030/dj-stands-for-pioneer-cdj?ref=shop_home_feat_1&logging_key=075719815c26b38f5835fc7d582247bd809e8462%3A821044030&variation show contact info
&variation0= show contact info
The Tallboys are the original CDJ stand. They securely float digital turntables 10” above the desktop leaving clearance for record players, dust covers, or other devices. Output cables can be routed inside the vertical tubes for a sleek look. The geometry of the Tallboys optimize workflow and improve posture which prevents back and neck pain after long sessions. Rubber bumpers are included to isolate the turntables from the metal lip (2 per stand). Don't forget to complete the setup with dimmable lights!
Compatibility:
-ALL Pioneer turntables. Select the Tallboy Mini for CDJ 350, 850, and XDJ 700.
-Only compatible with non-motorized Denon turntables
Material: Powdercoated Steel
Weight: 11.0 Lbs.each
Tallboy Dimensions (W x D x H): 12” x 12” x 22” (305mm x 305mm x 559mm
Tallboy Mini Dimensions (W x D x H): 9” x 12” x 18” (229 x 305mm x 559mm x 457mm)
Handmade in the U.S.A