Simple and vertical working double piston extender : r/redstone
Tileble double piston extender : r/redstone
Request] Vertically stackable flush horizontal double piston extender - Redstone Discussion and Mechanisms - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum
Request] Vertically stackable flush horizontal double piston extender - Redstone Discussion and Mechanisms - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum
Double Piston Extender That You Can't Bug! - Redstone Discussion and Mechanisms - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum
Tiny 1 wide stack able double piston extender Minecraft Map
1-high tileable double piston extender for any rotation. (Don't use this it's expensive and there's very likely a better design out there.) : r/redstone