The inner vacuum chamber is made of S.S. 304 grade, and the outer chamber made up of constructed out of thick PCRC sheet duly powder coated / S.S -304 grade looks good even under the most demanding working conditions. The vacuum chamber is a robust light alloy casting supplied with two shelves. The chamber is closed by a 15 mm thick toughened glass plate sealed onto a silicone rubber gasket. This glass plate is mounted onto the door by multi-spring-loaded pins to ensure an excellent, even seal to the chamber. Door closure is achieved via a strong and positive twist action latch.