When inquiring about bellows, please use the names and explanations given in the following specifications.

Spring rate	N/mm	Load per unit displacement
Effective area	cm2	Pressurized area in the axial direction
Extent of flexibility	mm/MPa	Displacement per unit pressure
Maximum external pressure	MPa	External pressure which causes deformation when the bellows are fixed
Maximum internal pressure	MPa	Internal pressure which causes deformation when the bellows are fixed
Permissible elasticity	mm	Displacement which causes a large degree of residual displacement when there is expansion and contraction
Range of working pressure	MPa	Range of external or internal pressure used
Elasticity in operation	mm	Elastic length of bellows in operation
Elongation & shrinkage	+ , - mm	Elongation and shrinkage from the total length in operation
Lateral displacement	mm	Amount of axis movement on lateral displacement
Anglar displacement	degree	Angle of axle which is bent
State of installation at both ends		Details about the ends: whether they are free, rotary, fixed, or fixed mobile
Range of temperature used	degree	Range of temperature used
Media used inside		Media which are used inside
Media used outside		Media which are used outside
Corrosive action of media used		Extent of corrosive action of media used
Vibration	(Hz)	Frequency, etc. when vibration occurs
Designed life cycle	cycle	Number of cycles of operation during which breakage does not occur