Shimano Shimano Tourney RD-A070 Rear Derailleur - 7 Speed, Short Cage, Black, Shimano Rear Direct Mount - Philbrick's Ski, Board, & Bike
New 7 speed commuter with Shimano SIS index. No noise on stand, shifts smoothly but low clanking sound on road when pedaling in 4th & 5th though not other gears : r/bikewrench
Shimano Tourney TZ - Rear Derailleur with Hub Bolt Mount 6/7 Speed – REF. Bikes
Amazon.com : ENBO Shimano Bike Rear Derailleur RD-TY300 6/7 Speed Rear Derailleur Road MTB Bike Mountain Bike Direct Mount : Sports & Outdoors