About the Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter - Apple Support
Belkin USB-C THUNDERBOLT™ 3 (100W) CABLE (2m)
Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter - kite+key, Rutgers Tech Store
Amazon.com: QCEs Unidirectional USB C to Mini DisplayPort Cable, Support Only Mini DP Monitor(Not Thunderbolt 2 Display) 4K Video Output Cord 6.6Ft Compatible with USB-C MacBook Pro Mac Mini iMac to Mini