Stone 

High-performance type III hard gypsum

Features and benefits:

Thixotropic product, with slight vibration achieving flowability that ensures optimal detail reproduction.
Excellent water/powder ratio.
Compatible with all impression materials.
Complies with I.S.O. 6873 standards.

Especially indicated for:

Models for all types of removable dentures, full or partial, including skeletal and antagonist models.