Includes malleable stainless steel stylette encased in low friction nylon sheath. The stylette handles assist in controlled manipulation during insertion and retraction. The rounded tip; nylon sheath offers a smooth transition to silicone tubing. Probes – 15.5 cm length, 0.51 mm diameter. Nylon sheath – 0.81 mm diameter. Biocompatible silicone tubing – 33 cm length; 0.64 mm diameter. 5 per box.