Sticker

Trust, But Calibrate sticker

$4.99

A reminder for anyone with a pH pen.

Lab-label type with a tiny calibration curve. Goes on the thing you keep forgetting to calibrate.

White vinyl, about 4 inches across, cut to shape.

• Printed to order, one at a time.
• Ships to the US and Canada. $6.95 flat, free on orders of $75.00 or more.
• Payment is handled by Stripe. This site never sees your card.