World Precision Instruments Cat Ear Bars, Non Rupture

World Precision Instruments - Ear bars have laser-engraved scales, 50mm of calibration and are 6.2 mm square. WPI mouse and rat stereotaxic instruments and wpi rat stereotaxic instruments ear bars have a different zero point than those for the 505326 series. Standard (18°) ear bars taper at the tip to penetrate far into the ear canal for a more secure hold. Non-puncture ear bars have a 45° taper and do not puncture the tympanic membrane. - WPI (Additional S&H Or Hazmat Fees May Apply)