 "Sony Mini DV Cassette Without Chip" " Sony Chip - DVM80PRL Audio/Video Media CDW.com
"Record with the Mini DV-M80PRL Digital Video Cassette and create life like quality digital images. 80 minutes of Premium quality digital video are avaliable on this Mini Digital Video Tape. It features Metal evaporated tape, and a Diamond-Like Carbon coating protective layer, which improves durability and helps prevent shedding and drop out. 

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 "Sony PDV-184N DV tape - 1 x 184min" " Sony 184min Audio/Video Media CDW.com
"It's the most compact professional digital video recording media - the DVCAM format - yours with Sony quality in PDV Series videocassettes. Additionally, DVCAM videocassettes, thanks to higher C/N ratio and stability, are not just for standard recording or editing but for critical applications where its +2db higher output and improved durability, even at a 4 times high speed transfer mode, count.This PDV184N DVCAM 184-minutes advanced evaporated video makes 184-minute digital video recording possible with a pure cobalt evaporated coating for packing at high-density. The tape features built-in 16 kilobit IC memory PDV-N Series, DLC (Diamond Like Carbon) protective layer for extra durability and high-dimensional precision for compatibility by reducing tape-shrinkage over time to about 1/2 that of consumer DV tape." 