Bel-Art Captor Pen Holder; 1 x 1 x 2 in. (Pack of 3) (F13373-0000) Avoid fumbling and possible contamination of samples by keeping a marking pen handy and easy to uncap with only one hand Ideal for use near an autoclave, incubator, centrifuge, storeroom, freezer or anywhere on the lab bench Can be attached to any flat surface, such as lab equipment, a wall, a fume hood or even the benchtop with its adhesive backed, press-fit dual lock reclosable fastener Works with sharpie markers or other similar pens that have a cap with a pocket clip to attach to the penholder well