Filtering Kit - 4mm, No BAC 
M4 Rubber Washers (V1 pen) – 8 Pack
$2.19
Sold in a Pack of 8. Shipping at reduced cost when ordered standalone.
Reusable.
Use 2 per pen.
In stock
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Description
M4 rubber washers are used with V1 pens only to get the stopper all the way up to fully dispense the last shot. Other pens do not require these washers.
8 washers included – two are needed per pen.
Reusable.
Shipped in a 1st class envelope (no tracking) when ordered standalone, at a reduced shipping rate.
NOTE: Two included free of charge with purchase of a V1 pen.