Tom's Studio Lumos Spare Ink Reservoirs Refills Single & Duo/Mini Type:Lumos Single Refill which releases the middle piston

which releases the middle piston rod's shut-off mechanism

Volume: 4x12ml

calligraphy pen or brush

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Tom's Studio Lumos Spare Ink Reservoirs Refills Single & Duo/Mini Type:Lumos Single Refill which releases the middle pistonSpare ink reservoirs for your Lumos pen. These high quality fibre core reservoirs are designed to provide smooth and reliable ink flow, ensuring a seamless writing experience. Keep spares at hand so you can easily switch between colours without any hassle. Lumos Pro Duo and Mini Reservoirs: Pack of 5 Size: 6mm x 42mm Lumos Pro Single Reservoirs: Pack of 3 Size: 6mm x 91mm