Z boson pair production and compositeness at large hadron colliders

Z boson pair production at LHC and SSC provides an opportunity to study possible effects due to compositeness in a very high energy domain. We discuss several sources of anomalous effects and give the corresponding bounds on the appropriate compositeness scale. The best bounds are obtained for contact interactions implying longitudinal components of theZ's and for the anomalous couplings of three neutral vector bosons.