DetectaPen ® J800 retractable ball point pen with clip, extra durable. This pen has a metal detectable, X-ray visible and antimicrobial blue plastic body. Black ink. Shatter resistant. The PD3 may not work in sub-zero temperatures. The stainless steel cartridge has a writing length 9 km / 5.6 miles. Each PD2 pack contains 25 pens.