Dorsally, it has a pattern of 27–34 dark-brown, black, or bluish-black crossbands on the body and tail, which are narrowed and rounded on the sides.

The dark crossbands are separated by broad, yellowish-white interspaces, which may be spotted with black.

An unbanded black phenotype also occurs in some populations, reportedly in West and Central Java.

The major components of the venom are notably three-finger toxins (3FTxs) and Kunitz-type inhibitors.

These toxins as reported can mostly trigger progressive neuromuscular paralysis leading to respiratory failure and in some cases, cardiovascular interruptions like hypertension and shock.