Adjustable Window Security Bars (White-1PCS, 9.8-16.7In)

ZhouDaShu Adjustable Window Lock Bar, Shorter Window AC Security Bars for Child Safety, Window Stoppers for Small Vertical Sliding Windows/Dog Door, Extends from 9.8-16.7 in (Steel 1 Pcs)

Toddleroo by North States Sliding Window & Door Wedge Locks | Limits The Space That Windows and Sliding Doors can Open | No Tools Required | Baby proofing with Confidence (4-Pack, White)

The Lock-it Block-it Regular – (2 Devices) Home Security Adjustable Window Security Bars/Window Lock Bar, Security Bar for Sliding Glass Door, Child Safety Lock & Sliding Patio Door Security Bar