Hario
HARIO PT PLASTIC BUTTON FOR SSD / TDR
RM20
A plastic button for V60 Dripper Switch. 
Compatible with:
・Immersion Dripper SWITCH(SSD-200-B)
・Immersion Dripper SWITCH Server Set(SSD-5012-B)
Dimensions: Width 16.5 mm × Full Length 60.5 mm, Knob Length 32 mm
Made in Japan