ballpoint pens work on the principle of gravity

BIC Cristal Xtra Smooth Black Ballpoint Pens, Reliable Medium Point (1.0mm), 12-Count Pack

BIC Glide Bold Black Ballpoint Pens, Bold Point (1.6mm), 12-Count Pack, Retractable Ballpoint Pens With Comfortable Full Grip

Ballpoint Pens Black Ink Ball Point Pen with Super Soft Grip Medium Point 1.0mm Office Pens (Gold 12-count)

Zonon 38 Pieces Rubberized Ballpoint Pen with Stylus Tip Stylish Metal Pen Capactive Styli Pen with Soft Rubberized Grip, Black Ink Pen for Most...

Eaasty 100 Pieces Pens Bulk Long Retractable Ballpoint Pen 0.7 mm Medium Point Click Black Ink Pen Gel Pens Smooth Writing Pens with Clip...

Ballpoint Pen 2-in-1 Stylus Retractable Ballpoint Pen with Stylus tip, Metal Stylus Pen for Touch Screens, 1.0 mm Black Ink (Pastel Color) 6 Pack

Paper Mate InkJoy 300RT Retractable Ballpoint Pens, Medium Point (1.0mm), Black, Pack of 36, Ideal for Office Supplies, Journaling, and Writing Accessories

BIC Glide Ultra Comfort Retractable Ballpoint Pens, Medium Point (1.0mm), Black, Assorted Barrel Colors, 1-Count Pack

Amazon Basics Retractable Ballpoint Pen – Black, 1.2mm, 12-Pack

Wholesale Pens – Assorted styles of click pens -Box of 100 – colors and styles will vary