SMS hygienic sight glass products are made by forged material.Type of ends available: Weld end, Male end and Female end.Glass is made of tempered glass which can bear Max working 10 Bar. Replaceable.EPDM, Silicon, Viton and PTFE seats are available, making the Sight Glass suitable for many applications in such as food, dairy, beverage, meat processing, vacuum processing, pharmaceutical, chemical, and many other industries.It is necessary you specify at the time of order heat numbers and MTR's are required. Material Test Reports (MTR's) are available to document all heat number.